Add setup go step to build workflow

.github/workflows/build.yml

@@ -13,6 +13,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
+      - name: Set up Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: 1.16
       - name: run build
         run: make build
       - name: run test for report