Update comment-on-asciidoc-changes.yml

Author: bmorelli25

.github/workflows/comment-on-asciidoc-changes.yml

@@ -31,5 +31,5 @@ jobs:
               owner: context.repo.owner,
               repo: context.repo.repo,
               issue_number: context.payload.pull_request.number,
-              body: 'It looks like this PR modifies one or more `.asciidoc` files. The documentation is currently under a documentation freeze. Please do not merge this PR. See the [migration guide](https://elastic.github.io/docs-builder/migration/index.html) to learn more.'
+              body: 'It looks like this PR modifies one or more `.asciidoc` files. These files are being migrated to Markdown, and any changes merged now will be lost. See the [migration guide](https://elastic.github.io/docs-builder/migration/index.html) for details.'
             })