Bump thollander/actions-comment-pull-request from 2.4.2 to 2.4.3

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] <[email protected]>

.github/workflows/pr_comment.yml

@@ -8,7 +8,7 @@ jobs:
     steps:
       - name: Create PR comment
         if: github.event_name == 'pull_request' && github.repository == github.event.pull_request.head.repo.full_name && github.event.label.name == 'documentation' # if this is a pull request build AND the pull request is NOT made from a fork
-        uses: thollander/actions-comment-pull-request@d61db783da9abefc3437960d0cce08552c7c004f
+        uses: thollander/actions-comment-pull-request@1d3973dc4b8e1399c0620d3f2b1aa5e795465308
         with:
           message: 'Once the build has completed, you can preview any updated documentation at this URL: https://fluxml.ai/Flux.jl/previews/PR${{ github.event.number }}/ in ~20 minutes'
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}