Add install command for go >= 1.17

[Selion05]

go get outside of a module was deprecated at 1.17 and doesn't work on 1.18 anymore

[Leonetienne]

This should be merged. I just stumbled upon this issue myself, and it robbed me of five minutes of my time.

[Leonetienne]

I had to define the target directory explicitly for it to be accessible from the default PATH:
sudo GOBIN=/usr/local/bin go install github.com/zsa/wally-cli@latest

[noboruma]

I was able to run go install github.com/zsa/wally-cli@latest with go1.22 - worked like a charm