Mail AI features outdated/missing on AI overview page

[ChristophWurst]

Before You Submit

• I have checked for existing issues and pull requests related to my suggestion.
• I have posted on the Nextcloud Community Help Forum if my suggestion is a troubleshooting scenario or I'm unsure about the solution.

Type of Suggestion

Reporting a mistake

Relevant Documentation Links

https://github.com/nextcloud/documentation/blob/master/admin_manual/ai/overview.rst

Summary

Update the Mail AI features on the AI features overview

Details

No response

Additional Notes

No response