Explicitly setup Gradle 8 for Java 8 compatibility

Author: antonsviridov-src

.github/workflows/ci.yml

@@ -26,6 +26,11 @@ jobs:
 
       - uses: sbt/setup-sbt@v1
 
+      - name: Setup Gradle 8.10
+        uses: gradle/actions/setup-gradle@v4
+        with:
+          gradle-version: '8.10' 
+
       - name: Main project tests
         run: sbt test