GH Actions/publish-wiki: use PAT for commenting on PRs

In the original PR (#6), a Personal Access Token (PAT) was used, but that resulted in the comment being left as if coming from my account, which is misleading, which is why the `repo_token` was initially switched back to `secrets.GITHUB_TOKEN`, with a reminder that a test would need to be done with a PR coming from a fork to verify that the auto-comment would still work.

As the first PR from a fork has now come in (#38), it has become clear that the auto-comment does not work with the default GitHub token, so this commit switches the `repo_token` back to the Personal Access Token and updates the message to make it clear I did not leave the comment.

We'll still have to test (again) whether using the PAT works for PRs coming from forks. If not, we'll have to revisit this workflow step.

Author: jrfnl

.github/workflows/publish-wiki.yml

@@ -130,8 +130,10 @@ jobs:
         if: ${{ github.event_name == 'pull_request' }}
         uses: mshick/add-pr-comment@v2
         with:
-          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          repo-token: ${{ secrets.COMMENT_ON_PRS_TOKEN }}
           message: |
+            **_=== This is an auto-generated comment ===_**
+
             Thank you for your PR.
             A dry-run has been executed on your PR, executing all markdown pre-processing for the wiki files.