add godoc badge

Author: Oleg Sucharevich

README.md

@@ -1,6 +1,7 @@
 # Codefresh SDK for Golang
 
-[![Codefresh build status]( https://g.codefresh.io/api/badges/pipeline/codefresh-inc/codefresh-io%2Fgo-sdk%2Fgo-sdk?type=cf-1)]( https://g.codefresh.io/public/accounts/codefresh-inc/pipelines/codefresh-io/go-sdk/go-sdk)
+[![Codefresh build status]( https://g.codefresh.io/api/badges/pipeline/codefresh-inc/codefresh-io%2Fgo-sdk%2Fgo-sdk?type=cf-1)]( https://g.codefresh.io/public/accounts/codefresh-inc/pipelines/codefresh-io/go-sdk/go-sdk) 
+[![GoDoc](https://godoc.org/github.com/codefresh-io/go-sdk?status.svg)](https://godoc.org/github.com/codefresh-io/go-sdk)
 
 # Start