Don't Run Format Under Go 1.17

gofmt is not aware of build tags and will choke on 1.18+ syntax.
Instead, just focus the format checks on the latest version of go.

.github/workflows/go.yml

@@ -19,6 +19,7 @@ jobs:
         uses: actions/checkout@v1
 
       - name: gofmt
+        if: ${{matrix.goversion == '1.19'}}
         run: |
           [[ -z  $(gofmt -l $(find . -name '*.go') ) ]]