build(deps): update thiserror requirement from 1.0.21 to 2.0.3

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@1.0.21...1.0.69)

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

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

Author: dependabot[bot]

Diff for: Cargo.toml

@@ -44,7 +44,7 @@ serde_json = "1"
 slab = "0.4.6"
 smol = "2"
 socket2 = "0.5"
-thiserror = "1.0.21"
+thiserror = "2.0.3"
 tinyvec = { version = "1.1", features = ["alloc"] }
 tokio = { version = "1.28.1", features = ["sync"] }
 tracing = { version = "0.1.10", default-features = false, features = ["std"] }