Correct usage of actions/setup-java@v2

Author: ShikaSD

.github/workflows/build-test.yml

@@ -13,5 +13,6 @@ jobs:
       uses: actions/setup-java@v2
       with:
         java-version: 11
+        distribution: adopt
     - name: Build with Gradle
       run: ./gradlew build test

.github/workflows/release.yml

@@ -13,5 +13,6 @@ jobs:
       uses: actions/setup-java@v2
       with:
         java-version: 11
+        distribution: adopt
     - name: Build with Gradle
       run: ./gradlew publishPlugins -Pgradle.publish.key=${{ secrets.GRADLE_PUBLISH_KEY }} -Pgradle.publish.secret=${{ secrets.GRADLE_PUBLISH_SECRET }}