Merge pull request #32 from aiven/ivanyu/jdk-11-workflow

Use Java 11 in Create release workflow

Author: willyborankin

.github/workflows/create_release.yml

@@ -12,6 +12,11 @@ jobs:
     name: Create Release
     runs-on: ubuntu-latest
     steps:
+      - name: Set up JDK 11
+        uses: actions/setup-java@v1
+        with:
+          java-version: 11
+
       - name: Checkout code
         uses: actions/checkout@v2
         with: