ci: fix addlicense

see google/go-licenses#75

Author: sbrugman

.github/workflows/license.yml

@@ -18,11 +18,13 @@ jobs:
     - uses: actions/checkout@v2
     - name: Set up Golang
       uses: actions/setup-go@v2
+      with:
+        go-version: '^1.16' # See https://github.com/google/go-licenses/issues/75
     - name: Install addlicense
       run: |
         export PATH=${PATH}:`go env GOPATH`/bin
         go get -v -u github.com/google/addlicense
     - name: Check license
       run: |
         export PATH=${PATH}:`go env GOPATH`/bin
-        addlicense -check -l mit -c "ING Wholesale Banking Advanced Analytics" $(find popmon/ -type f -name '*.py' -not -path popmon/version.py)
+        addlicense -check -l mit -c "ING Wholesale Banking Advanced Analytics" $(find popmon/ -type f -name '*.py' -not -path popmon/version.py)