Merge pull request #305 from The-OpenROAD-Project/dependabot/github_actions/actions/checkout-6

Bump actions/checkout from 5 to 6

Author: maliberty

.github/workflows/buildifier.yaml

@@ -25,7 +25,7 @@ jobs:
 
     steps:
       - name: Checkout Code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Cache buildifier
         id: cache-buildifier