[Feature] Update CI.

Author: zhanghai

.github/workflows/android.yml

@@ -8,8 +8,9 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v1
-    - name: set up JDK 1.8
+    - name: Check out repository
+      uses: actions/checkout@v2
+    - name: Set up JDK 1.8
       uses: actions/setup-java@v1
       with:
         java-version: 1.8