Installation instructions outdated

[0-wiz-0]

The project homepage instructs:

Using the default Ruby install can require you to use sudo when installing gems. Further installation instructions are in [the guides](https://guides.cocoapods.org/using/getting-started.html#getting-started).

$ sudo gem install cocoapods

but this doesn't work because ruby coming with macOS is 2.6 and the lowest supported version is 2.7.something.

When I look for this problem on the github issue tracker, I see lots of replies that say "do not use sudo gem install".
Please update the instructions to what should really be done to install this. It makes for a very bad first impression.