updated version of gh-pages deploy action

Author: DavidRamosArchilla

Diff for: .github/workflows/deploy_documentation.yml

@@ -10,7 +10,7 @@ defaults:
     shell: bash
 
 jobs:    
-  run-testsuite:
+  build-docs:
     runs-on: ubuntu-22.04
     env:
       CC: mpicc
@@ -61,7 +61,7 @@ jobs:
           make clean
           make html
       - name: Deploy to GitHub Pages
-        uses: peaceiris/actions-gh-pages@v3
+        uses: peaceiris/actions-gh-pages@v4
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: ./docs/source/_build/html