Update JamesIves/github-pages-deploy-action action to v4.6.3

Author: renovate[bot]

.github/workflows/publish.yml

@@ -31,7 +31,7 @@ jobs:
           java-version: 8
       - name: Generate site
         run: sbt makeSite
-      - uses: JamesIves/github-pages-deploy-action@v4.4.0
+      - uses: JamesIves/github-pages-deploy-action@v4.6.3
         with:
           branch: gh-pages
           folder: target/site