build(deps): bump thollander/actions-comment-pull-request

Bumps [thollander/actions-comment-pull-request](https://github.com/thollander/actions-comment-pull-request) from 2.4.2 to 2.4.3.
- [Release notes](https://github.com/thollander/actions-comment-pull-request/releases)
- [Commits](thollander/actions-comment-pull-request@d61db78...1d3973d)

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

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

.github/workflows/backport_v1.yaml

@@ -50,7 +50,7 @@ jobs:
           || contains(github.event.pull_request.labels.*.name, 'semver:unknown')
           || contains(github.event.label.name, 'semver:major')
           || contains(github.event.label.name, 'semver:unknown')
-        uses: thollander/actions-comment-pull-request@d61db783da9abefc3437960d0cce08552c7c004f
+        uses: thollander/actions-comment-pull-request@1d3973dc4b8e1399c0620d3f2b1aa5e795465308
         with:
           message: |
             Labels `semver-major` or `semver-unknown` can not trigger backports.