Update github-pages-deploy-action to version 4.7.3

Author: tniessen

.github/workflows/deploy.yml

@@ -28,7 +28,7 @@ jobs:
       - name: Build
         run: ./build.sh
       - name: Deploy to GitHub Pages
-        uses: JamesIves/github-pages-deploy-action@v4.6.4
+        uses: JamesIves/github-pages-deploy-action@v4.7.3
         with:
           branch: gh-pages
           folder: build