chore(deps): update gradle/actions action to v6.4.0

Author: renovate-bot

.github/workflows/presubmit.yaml

@@ -19,7 +19,7 @@ jobs:
         java-version: '21'
         distribution: 'temurin'
     - name: Setup Gradle
-      uses: gradle/actions/setup-gradle@9c971963bec38e04b3d30dcc455b5382be2fdbfb # v6.3.0
+      uses: gradle/actions/setup-gradle@3f5f9adaf7d9fecd50b5935e54106014257a94e6 # v6.4.0
       with:
         cache-disabled: true
     # TODO(jradcliff): Add a lint step. Currently blocked by https://github.com/abcxyz/actions/issues/107.