Attempt to fix the build testing error.

.github/workflows/releasebuild.yml

@@ -24,6 +24,8 @@ jobs:
         uses: actions/checkout@v2
       - name: Install Go
         uses: actions/setup-go@v2
+        with:
+          go-version: '1.16'
       - uses: actions/cache@v2
         with:
           path: ~/go/pkg/mod