Bump peaceiris/actions-gh-pages action. (#89)

Author: felixfontein

.github/workflows/_shared-docs-build-publish-gh-pages.yml

@@ -91,7 +91,7 @@ jobs:
 
       - name: Publish
         # this action uses a token with contents:write, pinning to commit
-        uses: peaceiris/actions-gh-pages@373f7f263a76c20808c831209c920827a82a2847 # v3.9.3
+        uses: peaceiris/actions-gh-pages@4eb285e828117bca26638192c3ed309c622e7bad # v3.9.3
         with:
           github_token: ${{ secrets.GH_TOKEN }}
           publish_dir: html