Bump JamesIves/github-pages-deploy-action in the actions group

Bumps the actions group with 1 update: [JamesIves/github-pages-deploy-action](https://github.com/jamesives/github-pages-deploy-action).


Updates `JamesIves/github-pages-deploy-action` from 4.6.4 to 4.6.8
- [Release notes](https://github.com/jamesives/github-pages-deploy-action/releases)
- [Commits](JamesIves/github-pages-deploy-action@v4.6.4...v4.6.8)

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

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

.github/workflows/pkgdown.yaml

@@ -38,7 +38,7 @@ jobs:
 
       - name: Deploy to GitHub pages 🚀
         if: github.event_name != 'pull_request'
-        uses: JamesIves/github-pages-deploy-action@v4.6.4
+        uses: JamesIves/github-pages-deploy-action@v4.6.8
         with:
           clean: false
           branch: gh-pages