Update gradle/actions digest to 473878a (#39)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/check.yml

@@ -16,7 +16,7 @@ jobs:
           distribution: temurin
           java-version: 11
       - name: Setup Gradle
-        uses: gradle/actions/setup-gradle@d156388eb19639ec20ade50009f3d199ce1e2808 # v4
+        uses: gradle/actions/setup-gradle@473878a77f1b98e2b5ac4af93489d1656a80a5ed # v4
       - name: Check
         run: ./gradlew check
         env: