make install instructions clearer

[kylebakerio]

For those who don't use 'go', it's a tricky to google thing. I wasn't aware this was related to the go language and assumed it was some other utility program.

Then, the instructions list the out of date way to use the go get command first, and don't make it immediately clear that alternate instructions are coming afterwards.

[ZerdoX-x]

GOBIN=/home/user/.local/bin go install github.com/imthaghost/goclone/cmd/goclone@latest