Installing nvm by Homebrew is deprecated

[KaitoMuraoka]

As of 2025, installing nvm via Homebrew is deprecated.

Homebrew installation is not supported. If you have issues with homebrew-installed nvm, please brew uninstall it, and install it using the instructions below, before filing an issue.

https://github.com/nvm-sh/nvm/blob/44a3cdb9b8738ae02237972ec58728a568f9d552/README.md?plain=1#L310

Therefore, We need to edit it for installation using a different method.
such as curl.

[cwarnermm]

Thanks, @KaitoMuraoka! Are you open to creating a PR to update the Mattermost Developer Documentation with this change?

[KaitoMuraoka]

@cwarnermm
Sorry for the delayed response,
I'll take care of it this weekend.

[dakshhhhh16]

Hello maintainers
I came across this issue and it looks interesting! I’d like to contribute to it as part of Hacktoberfest 2025.
Before I start working, could you please confirm if this issue is still relevant or available to work on?
If it is, I’ll begin setting up my environment and submit a PR soon.
Thank you for your time and for maintaining this awesome project!