Lock github-pages-deploy-action to v4.6.4

ref: JamesIves/github-pages-deploy-action#1697

Author: northword

.github/workflows/main.yml

@@ -48,7 +48,7 @@ jobs:
           path: dist
 
       - name: Deploy 🚀
-        uses: JamesIves/github-pages-deploy-action@v4
+        uses: JamesIves/github-pages-deploy-action@v4.6.4
         with:
           branch: gh-pages
           folder: dist