chore(deps): update dependency plexapi to v4.15.2

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
PlexAPI	==4.15.1 -> ==4.15.2

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Release Notes

pkkid/python-plexapi (PlexAPI)

### [`v4.15.2`](https://togithub.com/pkkid/python-plexapi/releases/tag/4.15.2) [Compare Source](https://togithub.com/pkkid/python-plexapi/compare/4.15.1...4.15.2) ### Breaking Changes [#​1247](https://togithub.com/pkkid/python-plexapi/issues/1247) - Remove reload after saving the batch-edits ### Bug Fixes [#​1239](https://togithub.com/pkkid/python-plexapi/issues/1239) - Change Discover search URL [#​1253](https://togithub.com/pkkid/python-plexapi/issues/1253) - Fix PlexServer.isLatest() check ### New Features [#​1241](https://togithub.com/pkkid/python-plexapi/issues/1241) - Add X-Plex-Language header to config ### Improvements [#​1240](https://togithub.com/pkkid/python-plexapi/issues/1240) - ci: retry bootstrap step [#​1244](https://togithub.com/pkkid/python-plexapi/issues/1244) - Fix invalid escape sequence DepreactionWarning [#​1245](https://togithub.com/pkkid/python-plexapi/issues/1245) - test_audio: Add missing assert [#​1250](https://togithub.com/pkkid/python-plexapi/issues/1250) - Suppress toDatetime error when subscribedAt is empty [#​1251](https://togithub.com/pkkid/python-plexapi/issues/1251) - Change Episode parent\* attributes to properties *** Thanks to new contributors [@​twolaw](https://togithub.com/twolaw), [@​darthShadow](https://togithub.com/darthShadow), and [@​BenjaminOddou](https://togithub.com/BenjaminOddou).

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