Merge pull request #1733 from square/renovate/actions-checkout-4.x

Update actions/checkout action to v4

Author: JakeWharton

.github/workflows/build.yml

@@ -14,7 +14,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
 
       - name: Validate Gradle Wrapper
         uses: gradle/wrapper-validation-action@v1