go: update module path

[thde]

This PR updates the module path of the Go bindings.

This should allow to install the bindings based on published tags:

❯ go get github.com/ggerganov/whisper.cpp/bindings/[email protected]
go: module github.com/ggerganov/[email protected] found, but does not contain package github.com/ggerganov/whisper.cpp/bindings/go

It will probably require other PR's related to the Go bindings to be updated.