Fix publishing

Author: Vitaliy Boyko

.github/workflows/gradlepublish.yml

@@ -13,10 +13,10 @@ jobs:
 
     steps:
       - uses: actions/checkout@v2
-      - 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: Gradle wrapper
         run: gradle wrapper
       - name: Grant execute permission for gradlew

.github/workflows/gradlepublishalpha.yml

@@ -14,10 +14,10 @@ jobs:
 
     steps:
       - uses: actions/checkout@v2
-      - 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: Gradle wrapper
         run: gradle wrapper
       - name: Grant execute permission for gradlew