docs: clears up difference of go from other languages (#2704)
docs: clears up difference of go from other languages (#2704)

* docs: clears up difference of go from other languages

* docs: moving comment to just before the unmarshal 

handling nits of moving comment to right before the unmarshal (rather than before the struct definition that defines the []byte. Following standard of sentence comments having a "."
GoogleCloudPlatform/golang-samples,GoogleCloudPlatform/golang-samples,GoogleCloudPlatform/golang-samples