upgraded GitHub actions Java

Author: musketyr

.github/workflows/gradle.yml

@@ -11,10 +11,10 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Set up JDK 1.8
+      - name: Set up JDK 11
         uses: actions/setup-java@v4
         with:
-          java-version: '8'
+          java-version: '11'
           distribution: 'zulu'
       - uses: gradle/actions/setup-gradle@v4
       - run: ./gradlew check coveralls --stacktrace

.github/workflows/release.yml

@@ -12,10 +12,10 @@ jobs:
       GRADLE_OPTS: "-Xmx6g -Xms4g"
     steps:
       - uses: actions/checkout@v4
-      - name: Set up JDK 1.8
+      - name: Set up JDK 11
         uses: actions/setup-java@v4
         with:
-          java-version: '8'
+          java-version: '11'
           distribution: 'zulu'
       - name: Decode PGP
         id: write_file