Bump plexapi from 4.15.2 to 4.15.3

Bumps [plexapi](https://github.com/pkkid/python-plexapi) from 4.15.2 to 4.15.3.
- [Release notes](https://github.com/pkkid/python-plexapi/releases)
- [Commits](https://github.com/pkkid/python-plexapi/compare/4.15.2...4.15.3)

---
updated-dependencies:
- dependency-name: plexapi
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -4,7 +4,7 @@ lxml==4.9.3
 num2words==0.5.12
 pathvalidate==3.2.0
 pillow==10.0.1
-PlexAPI==4.15.2
+PlexAPI==4.15.3
 psutil==5.9.5
 python-dotenv==1.0.0
 requests==2.31.0