chore(deps): update quick-xml requirement from ^0.28 to ^0.29

Updates the requirements on [quick-xml](https://github.com/tafia/quick-xml) to permit the latest version.
- [Release notes](https://github.com/tafia/quick-xml/releases)
- [Changelog](https://github.com/tafia/quick-xml/blob/master/Changelog.md)
- [Commits](tafia/quick-xml@v0.28.0...v0.29.0)

---
updated-dependencies:
- dependency-name: quick-xml
  dependency-type: direct:production
...

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

crates/plex-api/Cargo.toml

@@ -17,7 +17,7 @@ serde = { version = "^1.0", features = ["derive"] }
 serde_json = "^1.0"
 futures = "^0.3.25"
 serde_with = { version = "^3.0", features = ["json"] }
-quick-xml = { version = "^0.28", features = [ "serialize" ] }
+quick-xml = { version = "^0.29", features = [ "serialize" ] }
 serde_plain = "^1.0.1"
 serde_repr = "^0.1"
 time = { version = "^0.3", features = ["serde-well-known", "serde-human-readable"] }