Update workflows (pr & publication) to use Gradle JDK 11

Related to YM-26407

Author: mariasenosiain

.github/workflows/pr.yml

@@ -16,10 +16,10 @@ jobs:
         restore-keys: |
           ${{ runner.os }}-gradle${{ hashFiles('gradle/wrapper/gradle-wrapper.properties')}}-
           ${{ runner.os }}-
-    - name: set up JDK 1.8
+    - name: Set up JDK 11
       uses: actions/setup-java@v1
       with:
-        java-version: 1.8
+        java-version: 11
 
     - name: Run tests with Gradle
       run: ./gradlew testDebug --no-daemon

.github/workflows/publish.yml

@@ -19,10 +19,10 @@ jobs:
         restore-keys: |
           ${{ runner.os }}-gradle${{ hashFiles('gradle/wrapper/gradle-wrapper.properties')}}-
           ${{ runner.os }}-
-    - name: set up JDK 1.8
+    - name: Set up JDK 11
       uses: actions/setup-java@v1
       with:
-        java-version: 1.8
+        java-version: 11
 
     - name: Run tests with Gradle
       run: ./gradlew testDebug --no-daemon