[cargo] Update thiserror requirement from 1.0.63 to 2.0.6

Updates the requirements on [thiserror](https://github.com/dtolnay/thiserror) to permit the latest version.
- [Release notes](https://github.com/dtolnay/thiserror/releases)
- [Commits](dtolnay/thiserror@1.0.63...2.0.6)

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

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

Cargo.toml

@@ -22,7 +22,7 @@ async-trait = "0.1.81"
 toml = "0.8.19"
 mongodb = "3.0.1"
 bson = "2.11.0"
-thiserror = "1.0.63"
+thiserror = "2.0.6"
 openssl = { version = "0.10.59", features = ["vendored"] }
 rand = "0.8.5"
 tower-http = { version = "0.6.1", features = ["cors", "trace"] }