update github action to v2

Author: vietnguyen-td

.github/workflows/build.yml

@@ -85,7 +85,7 @@ jobs:
     - uses: actions/checkout@v2
     - uses: actions/setup-java@v2
       with:
-        java-version: 1.8
+        java-version: 8
         distribution: 'zulu'
     - name: Connect
       run: mysql -h 127.0.0.1 --port 3306 -uroot -proot -e "show databases;"
@@ -121,7 +121,7 @@ jobs:
     - uses: actions/checkout@v2
     - uses: actions/setup-java@v2
       with:
-        java-version: 1.8
+        java-version: 8
         distribution: 'zulu'
     - name: Connect
       run: psql -h 127.0.0.1 -p 5432 -U postgres -d postgres -c "\l"