Update Gradle to v8.0.2 (#33)

Also begin verifying the integrity of the Gradle distribution and the
wrapper JAR.

Author: gabrielfeo

.github/actions/build/action.yml

@@ -18,6 +18,8 @@ runs:
       with:
         distribution: temurin
         java-version: 8
+    - name: Validate Gradle wrapper JAR
+      uses: gradle/wrapper-validation-action@v1.0.6
     - name: Run Gradle
       uses: gradle/gradle-build-action@v2.1.4
       with:

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,7 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.0.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.0.2-bin.zip
+distributionSha256Sum=ff7bf6a86f09b9b2c40bb8f48b25fc19cf2b2664fd1d220cd7ab833ec758d0d7
 networkTimeout=10000
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists