(deps): Bump actions/deploy-pages from 4 to 5

Bumps [actions/deploy-pages](https://github.com/actions/deploy-pages) from 4 to 5.
- [Release notes](https://github.com/actions/deploy-pages/releases)
- [Commits](actions/deploy-pages@v4...v5)

---
updated-dependencies:
- dependency-name: actions/deploy-pages
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/deploy-zensical.yml

@@ -104,4 +104,4 @@ jobs:
       - name: D4) Deploy to GitHub Pages
         # WHY: This step takes the uploaded artifact and publishes it to
         # GitHub Pages so the documentation becomes publicly accessible.
-        uses: actions/deploy-pages@v4
+        uses: actions/deploy-pages@v5