Clarify what happens with git remote rm command

[peterjv26]

Added a note to say the "git remote rm" command just unlinks local and remote repositories

Why:

Closes [issue link]

What's being changed:

Updated the doc adding a line to clarify what exactly happens with "git remove rm" command

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Source	Staging	Production	What Changed
content/get-started/getting-started-with-git/managing-remote-repositories.md	Modified	Original

[ramyaparimi]

@peterjv26
Thanks so much for opening a PR! I'll get this triaged for review ⚡

[skedwards88]

Thank you for this addition! I made some minor wording changes that I will incorporate, then we'll get this merged down for you.

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