add Git Bash info to README

[dcchuck]

I had opened an issue for this, eventually went with WSL2. But after the comment in there figured good to add to docs.

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[ModyQyW]

Just a note. eval "$(fnm env | sed 1d)" works for me. But eval $(fnm env | sed 1d) doesn't. Thanks for the PR! :D

[dcchuck]

Just a note. eval "$(fnm env | sed 1d)" works for me. But eval $(fnm env | sed 1d) doesn't. Thanks for the PR! :D

Thank you! I've updated the PR to include quotes.

Worked on my machine, but that appears to be a quirk. Docs say to use quotes to avoid such inconsistencies 👍 docs

[Schniz]

Seems like this is fixed by fnm automatically running cygwin for you in #960 🙏