chore: Included githubactions in the dependabot config (#8554)

This should help with keeping the GitHub actions updated on new releases. This will also help with keeping it secure.

Dependabot helps in keeping the supply chain secure https://docs.github.com/en/code-security/dependabot

GitHub actions up to date https://docs.github.com/en/code-security/dependabot/working-with-dependabot/keeping-your-actions-up-to-date-with-dependabot

https://github.com/ossf/scorecard/blob/main/docs/checks.md#dependency-update-tool
Signed-off-by: naveensrinivasan <[email protected]>

Author: naveensrinivasan

.github/dependabot.yml

@@ -102,3 +102,8 @@ updates:
     versions:
     - 7.13.0
     - 7.13.1
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule: 
+      interval: daily
+    open-pull-requests-limit: 10