Update thiserror requirement from 1.0.30 to 2.0.0

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@1.0.30...2.0.0)

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

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

openssh-sftp-protocol-error/Cargo.toml

@@ -11,6 +11,6 @@ keywords = ["ssh", "multiplex", "async", "network", "sftp"]
 categories = ["asynchronous", "network-programming", "api-bindings"]
 
 [dependencies]
-thiserror = "1.0.30"
+thiserror = "2.0.0"
 serde = { version = "1.0", features = ["derive"] }
 vec-strings = { version = "0.4.5", features = ["serde"] }