Fix prettier workflow

.github/workflows/prettier.yml

@@ -1,10 +1,10 @@
 name: Prettier
-on:
-    pull_request:
-        branches: [main]
+on: [push]
 jobs:
     format:
         runs-on: ubuntu-latest
+        permissions:
+            contents: write
         steps:
             - name: Checkout
               uses: actions/checkout@v4.1.2
@@ -13,7 +13,7 @@ jobs:
             - name: Setup Node.js environment
               uses: actions/setup-node@v4.0.2
               with:
-                  node-version: "18.x"
+                  node-version: "20.x"
             - run: npm ci
             - run: npm run prettier
             - name: Commit changes