chore(deps): update dependency plexapi to v4.15.5

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
PlexAPI	==4.15.4 -> ==4.15.5

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Release Notes

pkkid/python-plexapi (PlexAPI)

### [`v4.15.5`](https://togithub.com/pkkid/python-plexapi/releases/tag/4.15.5) [Compare Source](https://togithub.com/pkkid/python-plexapi/compare/4.15.4...4.15.5) ### Bug Fixes - [#​1265](https://togithub.com/pkkid/python-plexapi/issues/1265) - Passing params for setSelectedSubtitles streams - [#​1281](https://togithub.com/pkkid/python-plexapi/issues/1281) - fix: explicitly set includeFiles - [#​1269](https://togithub.com/pkkid/python-plexapi/issues/1269) - Return None for history source if media no longer exists - [#​1276](https://togithub.com/pkkid/python-plexapi/issues/1276) - Update algorithm for parsing smart filters ### New Features - [#​1271](https://togithub.com/pkkid/python-plexapi/issues/1271) - Add `MyPlexAccount.ping()` to refresh authentication token ### Improvements - [#​1266](https://togithub.com/pkkid/python-plexapi/issues/1266) - docs: fix readthedocs build - [#​1277](https://togithub.com/pkkid/python-plexapi/issues/1277) - Update documentation for collection.sortUpdate. - [#​1282](https://togithub.com/pkkid/python-plexapi/issues/1282) - build(pypi): verify readme and add long_description_content_type *** Thanks to new contributors [@​ShanaryS](https://togithub.com/ShanaryS), [@​jasmeralia](https://togithub.com/jasmeralia), and [@​Dr-Blank](https://togithub.com/Dr-Blank).

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