Update thiserror requirement from 1 to 2

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@1.0.0...2.0.3)

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

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

judger/Cargo.toml

@@ -41,6 +41,6 @@ chrono = { version = "0.4", features = ["serde"] }
 
 # error handling
 anyhow = "1"
-thiserror = "1"
+thiserror = "2"
 
 uuid = { version = "1.4", features = ["serde", "v4"] }