update docs ci

Author: SteffenDE

.github/workflows/docs.yml

@@ -42,7 +42,7 @@ jobs:
         run: mix docs
 
       - name: Upload artifact
-        uses: actions/upload-pages-artifact@v2
+        uses: actions/upload-pages-artifact@v3
         with:
           path: doc/
 
@@ -56,4 +56,4 @@ jobs:
     steps:
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v2
+        uses: actions/deploy-pages@v4