Update instant-xml requirement from 0.5 to 0.6

Updates the requirements on [instant-xml](https://github.com/djc/instant-xml) to permit the latest version.
- [Release notes](https://github.com/djc/instant-xml/releases)
- [Commits](djc/instant-xml@0.5.0...0.6.0)

---
updated-dependencies:
- dependency-name: instant-xml
  dependency-version: 0.6.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Cargo.toml

@@ -17,7 +17,7 @@ __rustls = []
 async-trait = "0.1.52"
 celes = "2.1"
 chrono = { version = "0.4.23", features = ["serde"] }
-instant-xml = { version = "0.5", features = ["chrono"] }
+instant-xml = { version = "0.6", features = ["chrono"] }
 rustls-platform-verifier = { version = "0.6", optional = true }
 serde = { version = "1.0", features = ["derive"] }
 tokio = { version = "1.0", features = ["io-util", "net", "time"] }