upgrade gitub java action

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1891246 13f79535-47bb-0310-9956-ffa450edef68

.github/workflows/test-gradle.yml

@@ -19,8 +19,10 @@ jobs:
 
     - name: Set up JDK 1.8
       uses: actions/setup-java@v2
-      with:
-        java-version: 1.8
+    with:
+      distribution: 'adopt'
+      java-version: '8'
+      check-latest: true
 
     - name: Cache Gradle wrapper and dependencies
       uses: actions/cache@v2.1.3