fixup! ci: Use single comment for preview build notifications

Author: robin-nitrokey

.github/workflows/ci.yml

@@ -66,6 +66,6 @@ jobs:
             The successful documentation build for ${{ github.sha }} was deployed for preview:
             * https://docspreview.nitrokey.com/PR-${{ github.event.number }}
 
-            <small>workflow run ${{ github.run_id }} / attempt ${{ github.run_attempt }}</small>
+            _generated by [workflow run ${{ github.run_id }}](https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}) (attempt ${{ github.run_attempt }})_
           comment-tag: preview-build