github actions checkout parameter

should allow getting the latest tag and avoid `No names found, cannot describe anything`

.github/workflows/go.yml

@@ -19,6 +19,8 @@ jobs:
 
     - name: Check out code into the Go module directory
       uses: actions/checkout@v2
+      with:
+        fetch-depth: '0'
 
     - name: Test & Vet
       run: make test vet