Bump JamesIves/github-pages-deploy-action to 4.7.3

Author: mrotteveel

.github/workflows/publish-to-github-pages.yml

@@ -42,7 +42,7 @@ jobs:
           name: pages-artifact
           path: pages
       - name: Deploy to GitHub pages
-        uses: JamesIves/github-pages-deploy-action@v4.5.0
+        uses: JamesIves/github-pages-deploy-action@6c2d9db40f9296374acc17b90404b6e8864128c8
         with:
           branch: gh-pages
           folder: pages