chore(deps): bump Kong/public-shared-actions from 2.7.2 to 2.7.3

Bumps [Kong/public-shared-actions](https://github.com/kong/public-shared-actions) from 2.7.2 to 2.7.3.
- [Release notes](https://github.com/kong/public-shared-actions/releases)
- [Commits](Kong/public-shared-actions@v2.7.2...v2.7.3)

---
updated-dependencies:
- dependency-name: Kong/public-shared-actions
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/checks.yaml

@@ -39,7 +39,7 @@ jobs:
       - name: Check if PR is up to date, if it is skip workflows for this ref
         id: 'up-to-date'
         if: github.event_name == 'push' && startsWith(github.ref, 'refs/heads/')
-        uses: Kong/public-shared-actions/pr-previews/up-to-date@v2.7.2
+        uses: Kong/public-shared-actions/pr-previews/up-to-date@v2.7.3
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}