[Docs] Fix typo in hrv_time

[KSCzzZ]

The feature name in the comment is hcvnn, but the code is mcvnn

This is a template for making a pull-request. You can remove the text and sections and write your own thing if you wish, just make sure you give enough information about how and why. If you have any issues or difficulties, don't hesitate to open an issue so we can help.

Description

This PR aims at adding this feature...

Proposed Changes

I changed the foo() function so that ...

Checklist

Here are some things to check before creating the PR. If you encounter any issues, do let us know :)

• I have read the CONTRIBUTING file.
• My PR is targetted at the dev branch (and not towards the master branch).
• I ran the CODE CHECKS on the files I added or modified and fixed the errors.
• I have added the newly added features to News.rst (if applicable)

[welcome]

Thanks for opening this pull request! We'll make sure it's perfect before merging 🤗
Make sure to read the contributing guide. Also, if you think that your contribution is worthy of it, you can consider adding yourself to the Contributors list (feel free to ask us if you have any doubts).

[DominiqueMakowski]

Good catch @KSCzzZ, the failing tests are unlikely due to this change, so I'll merge this now :)

[welcome]

Congrats on merging your first pull request! 🎉🍾 We're looking forward to your next one!