Bump JamesIves/github-pages-deploy-action from 4.1.4 to 4.6.3 (#216)

Bumps [JamesIves/github-pages-deploy-action](https://github.com/jamesives/github-pages-deploy-action) from 4.1.4 to 4.6.3.
- [Release notes](https://github.com/jamesives/github-pages-deploy-action/releases)
- [Commits](JamesIves/github-pages-deploy-action@4.1.4...v4.6.3)

.github/workflows/publish.yaml

@@ -21,7 +21,7 @@ jobs:
         run: cd docs && mdbook build && touch book/.nojekyll
 
       - name: Publish documentation
-        uses: JamesIves/github-pages-deploy-action@4.1.4
+        uses: JamesIves/github-pages-deploy-action@v4.6.3
         with:
           branch: gh-pages
           folder: docs/book/