build(deps): Bump JamesIves/github-pages-deploy-action

Bumps [JamesIves/github-pages-deploy-action](https://github.com/jamesives/github-pages-deploy-action) from 4.6.6 to 4.6.8.
- [Release notes](https://github.com/jamesives/github-pages-deploy-action/releases)
- [Commits](JamesIves/github-pages-deploy-action@v4.6.6...v4.6.8)

---
updated-dependencies:
- dependency-name: JamesIves/github-pages-deploy-action
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

.github/workflows/documentation.yml

@@ -26,7 +26,7 @@ jobs:
       with:
         name: doc
         path: doc/index.html
-    - uses: JamesIves/[email protected].6
+    - uses: JamesIves/[email protected].8
       if: github.ref == 'refs/heads/main' && github.event_name == 'push'
       with:
         branch: gh-pages