Update prettier.yml

Author: Starbuck5

.github/workflows/prettier.yml

@@ -10,7 +10,7 @@ jobs:
     steps:
       - name: Check out repo
         uses: actions/checkout@v4
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         name: Configure npm caching
         with:
           path: ~/.npm