Update dxr requirement from 0.4.0 to 0.6.2

Updates the requirements on [dxr](https://github.com/ironthree/dxr) to permit the latest version.
- [Release notes](https://github.com/ironthree/dxr/releases)
- [Changelog](https://github.com/ironthree/dxr/blob/main/CHANGELOG.md)
- [Commits](ironthree/dxr@0.4.0...0.6.2)

---
updated-dependencies:
- dependency-name: dxr
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Cargo.toml

@@ -11,7 +11,7 @@ description = "nickserv account verification URL bot"
 
 [dependencies]
 clap = { version = "4.0.8", features = ["derive"] }
-dxr = "0.4.0"
+dxr = "0.6.2"
 http = "0.2.8"
 http-serde = "1.1.2"
 hyper = "0.14.20"