build(deps): bump thollander/actions-comment-pull-request from 2 to 3

Bumps [thollander/actions-comment-pull-request](https://github.com/thollander/actions-comment-pull-request) from 2 to 3.
- [Release notes](https://github.com/thollander/actions-comment-pull-request/releases)
- [Commits](https://github.com/thollander/actions-comment-pull-request/compare/v2...v3)

---
updated-dependencies:
- dependency-name: thollander/actions-comment-pull-request
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/gha_workflow_llama_stack_tests.yml

@@ -320,7 +320,7 @@ jobs:
       - name: "PR - Update comment"
         id: pr_update_comment
         if: github.event_name == 'pull_request_target'
-        uses: thollander/actions-comment-pull-request@v2
+        uses: thollander/actions-comment-pull-request@v3
         with:
           filePath: test-summary.md