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](thollander/actions-comment-pull-request@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] <[email protected]>

.github/workflows/docs-a11y.yml

@@ -90,7 +90,7 @@ jobs:
 
     - name: Comment PR with execution number
       if: inputs.allow_pr_comment == true
-      uses: thollander/actions-comment-pull-request@v2
+      uses: thollander/actions-comment-pull-request@v3
       with:
         message: |
           ## Documentation accessibility test results (using Pa11y)