Fix change note check to accept changes to itself

The file is not removed from the triggers, as we still want to check
that the workflow file itself is correct.

Author: redsun82

.github/workflows/check-change-note.yml

@@ -24,5 +24,7 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
-          gh api 'repos/${{github.repository}}/pulls/${{github.event.number}}/files' --paginate --jq 'any(.[].filename ; test("/change-notes/.*[.]md$"))' |
+          gh api 'repos/${{github.repository}}/pulls/${{github.event.number}}/files' --paginate --jq \
+            'any(.[].filename ; test("/change-notes/.*[.]md$")) or
+             all(.[].filename ; .==".github/workflows/check-change-note.yml")' |
           grep true -c