chore(deps): update dependency plexapi to v4.15.13

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
PlexAPI	==4.15.12 -> ==4.15.13

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Release Notes

pkkid/python-plexapi (PlexAPI)

### [`v4.15.13`](https://togithub.com/pkkid/python-plexapi/releases/tag/4.15.13) [Compare Source](https://togithub.com/pkkid/python-plexapi/compare/4.15.12...4.15.13) ### Bug Fixes - [#​1404](https://togithub.com/pkkid/python-plexapi/issues/1404) - Fix escape sequence in docstring regex - [#​1413](https://togithub.com/pkkid/python-plexapi/issues/1413) - (Temporary Fix) Changed friends route to the v2 sharings route - [#​1416](https://togithub.com/pkkid/python-plexapi/issues/1416) - Update default language for library add ### New Features - [#​1411](https://togithub.com/pkkid/python-plexapi/issues/1411) - Allow adding items from different server to playlist - [#​1417](https://togithub.com/pkkid/python-plexapi/issues/1417) - Add support for editing audience ratings and critic ratings ### Improvements - [#​1405](https://togithub.com/pkkid/python-plexapi/issues/1405) - Increase on-demand subtitles test timeout *** Thanks to new contributor [@​JamsRepos](https://togithub.com/JamsRepos).

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