Update gradle/gradle-build-action digest to 04b20c0

Author: renovate[bot]

.github/workflows/gradle.yml

@@ -32,7 +32,7 @@ jobs:
       - name: Make gradlew executable
         run: chmod +x gradlew
       - name: Build with Gradle
-        uses: gradle/gradle-build-action@4c39dd82cd5e1ec7c6fa0173bb41b4b6bb3b86ff
+        uses: gradle/gradle-build-action@04b20c065cf1ab708c96e64a8811018d0a1fbc88
         with:
           arguments: shadowAll
       - name: Upload a ChatFormatter Artifact