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]>

Cargo.toml

@@ -39,7 +39,7 @@ sha1 = "0.10"
 sha2 = "0.10"
 signature = { version = "2.2", features = ["digest", "std"] }
 spki = { version = "0.7", optional = true }
-thiserror = "1"
+thiserror = "2"
 url = { version = "2.5", features = ["serde"] }
 zeroize = { version = "1.8", features = ["serde", "derive"] }