Enhance safety checks in workflow to skip upload jobs for RC builds

This commit enhances the conditional checks within the 'upload' and 'upload-tag' jobs in our GitHub Actions workflows.

Previously, the jobs were executed based solely on the 'prerelease' flag of the release. However, there could be situations where this flag is accidentally set to 'false' for a Release Candidate (RC).

To avoid such mishaps, the conditions have been extended to check for the '-rc' suffix in the version string as well. This ensures that even if the 'prerelease' flag is incorrectly marked as 'false', the 'upload' and 'upload-tag' jobs are still skipped for RCs, thus preventing any unintended release of RC builds.

.github/workflows/upload-release-to-plugin-repo.yml

@@ -156,8 +156,9 @@ jobs:
         environment: wp.org plugin
         needs: [compute-should-update-trunk, update-changelog]
         if: |
-            needs.compute-should-update-trunk.outputs.should_update_trunk == 'true' &&
-            !github.event.release.prerelease && github.event.release.assets[0]
+            needs.compute-should-update-trunk.outputs.should_update_trunk == 'true'           &&
+            (!github.event.release.prerelease || !contains(github.event.release.name, '-rc')) &&
+            github.event.release.assets[0]
         env:
             PLUGIN_REPO_URL: 'http://caffeine.ngrok.io/svn/gutenberg'
             STABLE_VERSION_REGEX: '[0-9]\+\.[0-9]\+\.[0-9]\+\s*'
@@ -220,8 +221,9 @@ jobs:
         environment: wp.org plugin
         needs: [compute-should-update-trunk, update-changelog]
         if: |
-            needs.compute-should-update-trunk.outputs.should_update_trunk == 'false' &&
-            !github.event.release.prerelease && github.event.release.assets[0]
+            needs.compute-should-update-trunk.outputs.should_update_trunk == 'false'          &&
+            (!github.event.release.prerelease || !contains(github.event.release.name, '-rc')) &&
+            github.event.release.assets[0]
         env:
             PLUGIN_REPO_URL: 'http://caffeine.ngrok.io/svn/gutenberg'
             STABLE_VERSION_REGEX: '[0-9]\+\.[0-9]\+\.[0-9]\+\s*'