Update Format workflow

Author: penelopeysm

.github/workflows/Format.yml

@@ -5,8 +5,6 @@ on:
     branches:
       - main
   pull_request:
-    branches:
-      - main
 
 concurrency:
   # Skip intermediate builds: always.
@@ -20,4 +18,4 @@ jobs:
 
     steps:
       - name: Format code
-        uses: TuringLang/actions/Format@v2
+        uses: TuringLang/actions/Format@main