Fixes NO DOCUMENTATION (module kivy.uix.recycleview)

[misl6]

Maintainer merge checklist

• [x] Title is descriptive/clear for inclusion in release notes.
• [x] Applied a Component: xxx label.
• [ ] Applied the api-deprecation or api-break label.
• [ ] Applied the release-highlight label to be highlighted in release notes.
• [x] Added to the milestone version it was merged into.
• [ ] Unittests are included in PR.
• [ ] Properly documented, including versionadded, versionchanged as needed.

While reading docs, the user may find a "NO DOCUMENTATION (module kivy.uix.recycleview)" statement:

The kivy.uix.recycleview docs are fine, instead the error was generated by the kivy._version module, which doesn't have a valid docstring.