build(deps): bump actions/deploy-pages from 3 to 4

Bumps [actions/deploy-pages](https://github.com/actions/deploy-pages) from 3 to 4.
- [Release notes](https://github.com/actions/deploy-pages/releases)
- [Commits](actions/deploy-pages@v3...v4)

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

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

.github/workflows/ci.yml

@@ -265,4 +265,4 @@ jobs:
             # Deploys the documentation to GitHub Pages using the artifact (stored
             # but not committed changes for Actions) saved earlier.
             -   name: Deploy documentation to GitHub Pages
-                uses: actions/deploy-pages@v3
+                uses: actions/deploy-pages@v4