Update mxpy-cli.md

[BubuMVX]

Description of the pull request (what is new / what has changed)

This PR fixes the link URL to the command line interface.

Did you test the changes locally ?

• [x] yes
• [ ] no

Which category (categories) does this pull request belong to?

• [ ] document new feature
• [ ] update documentation that is not relevant anymore
• [ ] add examples or more information about a component
• [ ] fix grammar issues
• [x] other

[popenta]

I think the target branch should be development.

[BubuMVX]

I think the target branch should be development.

Oops, sorry! 😅 As it's already been merged, is there anything I need to do, or is it OK?

[popenta]

It's ok, we will merge the branches in our repository. Just to keep it in mind for the upcoming PRs.