Update go version (#515)

Author: reazulhoque

.github/workflows/license.yml

@@ -12,6 +12,8 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - uses: actions/setup-go@v2
+      with:
+          go-version: '1.16'
     - name: Install addlicense
       run: |
         export PATH=${PATH}:`go env GOPATH`/bin