dependabot: bump peaceiris/actions-gh-pages from 3.9.3 to 4.0.0

Bumps [peaceiris/actions-gh-pages](https://github.com/peaceiris/actions-gh-pages) from 3.9.3 to 4.0.0.
- [Release notes](https://github.com/peaceiris/actions-gh-pages/releases)
- [Changelog](https://github.com/peaceiris/actions-gh-pages/blob/main/CHANGELOG.md)
- [Commits](peaceiris/actions-gh-pages@v3.9.3...v4.0.0)

---
updated-dependencies:
- dependency-name: peaceiris/actions-gh-pages
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/cd-prod.yml

@@ -82,7 +82,7 @@ jobs:
           poetry run jupyter-book build ./qmlcourse
 
       - name: update publish dir to build branch
-        uses: peaceiris/actions-gh-pages@v3.9.3
+        uses: peaceiris/actions-gh-pages@v4.0.0
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: ./qmlcourse/_build/html/
@@ -102,7 +102,7 @@ jobs:
       #     xelatex -interaction=nonstopmode qmlcourse.tex
 
       # - name: send pdf book to build branch
-      #   uses: peaceiris/actions-gh-pages@v3.9.3
+      #   uses: peaceiris/actions-gh-pages@v4.0.0
       #   with:
       #     github_token: ${{ secrets.GITHUB_TOKEN }}
       #     publish_dir: ./qmlcourse/_build/latex/

.github/workflows/cd-stage.yml

@@ -96,7 +96,7 @@ jobs:
           poetry run jupyter-book build ./qmlcourse
 
       - name: update publish dir to build branch
-        uses: peaceiris/actions-gh-pages@v3.9.3
+        uses: peaceiris/actions-gh-pages@v4.0.0
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: ./qmlcourse/_build/html/
@@ -120,7 +120,7 @@ jobs:
 
       # - name: send pdf book to build branch
       #   if: github.event.inputs.build_pdf == 'yes'
-      #   uses: peaceiris/actions-gh-pages@v3.9.3
+      #   uses: peaceiris/actions-gh-pages@v4.0.0
       #   with:
       #     github_token: ${{ secrets.GITHUB_TOKEN }}
       #     publish_dir: ./qmlcourse/_build/latex/