build(deps): update thiserror requirement from 1.0.29 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@1.0.29...2.0.3)

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

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

frost-core/Cargo.toml

@@ -33,7 +33,7 @@ rand_core = { version = "0.6", default-features = false }
 serde = { version = "1.0.160", default-features = false, features = ["derive"], optional = true }
 serdect = { version = "0.2.0", optional = true }
 thiserror-nostd-notrait = { version = "1.0.29", default-features = false }
-thiserror = { version = "1.0.29", default-features = false, optional = true }
+thiserror = { version = "2.0.3", default-features = false, optional = true }
 visibility = "0.1.0"
 zeroize = { version = "1.5.4", default-features = false, features = ["derive"] }
 itertools = { version = "0.13.0", default-features = false }