Update peaceiris/actions-gh-pages action to v4

Author: renovate[bot]

.github/workflows/build.yml

@@ -69,7 +69,7 @@ jobs:
           ORG_GRADLE_PROJECT_sonatypePassword: ${{secrets.SONATYPE_PASSWORD}}
       - name: Publish documentation
         if: github.ref_type == 'tag'
-        uses: peaceiris/actions-gh-pages@v3
+        uses: peaceiris/actions-gh-pages@v4
         with:
           github_token: ${{github.token}}
           force_orphan: true