CamelCase func in docs is now deprecated

[alee792]

When building a project following the examples, I receive the following notice: google.golang.org/protobuf/protoc-gen-go/generator: cannot find module providing package google.golang.org/protobuf/protoc-gen-go/generator

Unfortunately, the new package does not export their GoCamelCase func.

Not sure how you prefer to address this, but I do think the docs should be updated to an alternative, if one exists.

[mennanov]

I've updated the docs.

Thanks for reporting!