docs: Document REPOSITORY_SEARCH_QUERY in README

Co-authored-by: zkoppert <[email protected]>

Author: Copilot

README.md

@@ -107,6 +107,7 @@ The needed GitHub app permissions are the following under `Repository permission
 | `GH_ENTERPRISE_URL`        | False                                           | ""                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | The `GH_ENTERPRISE_URL` is used to connect to an enterprise server instance of GitHub, ex: `https://yourgheserver.com`.<br>github.com users should not enter anything here.                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
 | `ORGANIZATION`             | Required to have `ORGANIZATION` or `REPOSITORY` |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       | The name of the GitHub organization which you want this action to work from. ie. github.com/github would be `github`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
 | `REPOSITORY`               | Required to have `ORGANIZATION` or `REPOSITORY` |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       | The name of the repository and organization which you want this action to work from. ie. `github/evergreen` or a comma separated list of multiple repositories `github/evergreen,super-linter/super-linter`                                                                                                                                                                                                                                                                                                                                                                                                                          |
+| `REPOSITORY_SEARCH_QUERY` | False | "" | When set, directs the action to use the GitHub Search API to search repositories matching this query instead of enumerating all organization repositories. Example: `org:my-org is:repository archived:false created:>2025-07-01`. |
 | `EXEMPT_REPOS`             | False                                           | ""                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | These repositories will be exempt from this action considering them for dependabot enablement. ex: If my org is set to `github` then I might want to exempt a few of the repos but get the rest by setting `EXEMPT_REPOS` to `github/evergreen,github/contributors`                                                                                                                                                                                                                                                                                                                                                                  |
 | `TYPE`                     | False                                           | pull                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | Type refers to the type of action you want taken if this workflow determines that dependabot could be enabled. Valid values are `pull` or `issue`.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
 | `TITLE`                    | False                                           | "Enable Dependabot"                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | The title of the issue or pull request that will be created if dependabot could be enabled.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |