Fix actions

Author: kevinwallimann

.github/workflows/compatibility-check.yml

@@ -21,6 +21,7 @@ jobs:
         with:
           persist-credentials: false
       - name: Set up JDK 1.8
+        uses: actions/setup-java@v2
         with:
           distribution: 'adopt'
           java-version: 8

.github/workflows/test-and-verify.yml

@@ -22,6 +22,7 @@ jobs:
         with:
           persist-credentials: false
       - name: Set up JDK 1.8
+        uses: actions/setup-java@v2
         with:
           distribution: 'adopt'
           java-version: 8