Bump plexapi from 4.15.16 to 4.16.0

Bumps [plexapi](https://github.com/pkkid/python-plexapi) from 4.15.16 to 4.16.0.
- [Release notes](https://github.com/pkkid/python-plexapi/releases)
- [Commits](https://github.com/pkkid/python-plexapi/compare/4.15.16...4.16.0)

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

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

requirements.txt

@@ -4,7 +4,7 @@ lxml==5.3.0
 num2words==0.5.13
 pathvalidate==3.2.1
 pillow==10.4.0
-PlexAPI==4.15.16
+PlexAPI==4.16.0
 psutil==6.1.0
 python-dotenv==1.0.1
 python-dateutil==2.9.0.post0