docs: Update description for third-party package Apitally

[itssimon]

Summary

Update the description of Apitally, a third-party package listed in the docs. This is to reflect how Apitally has evolved since it was first added.

Checklist

• I understand that this PR may be closed in case there was no previous discussion. (This doesn't apply to typos!)
• I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change.
• I've updated the documentation accordingly.

[Kludex]

Thanks :)