chore: Update JamesIves/github-pages-deploy-action action to v4.6.8

Author: renovate[bot]

.github/workflows/deploy.yml

@@ -28,7 +28,7 @@ jobs:
     - name: Deploy to GitHub Pages
       # You may pin to the exact commit or the version.
       # uses: JamesIves/github-pages-deploy-action@164583b9e44b4fc5910e78feb607ea7c98d3c7b9
-      uses: JamesIves/[email protected].7
+      uses: JamesIves/[email protected].8
       with:
         # This is the branch you wish to deploy to, for example gh-pages or docs.
         branch: gh-pages