Update thiserror requirement from 1.0 to 2.0 in the crates-io group

Updates the requirements on [thiserror](https://github.com/dtolnay/thiserror) to permit the latest version.

Updates `thiserror` to 2.0.3
- [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
  dependency-group: crates-io
...

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

libpcap-tools/Cargo.toml

@@ -23,7 +23,7 @@ maintenance                       = { status     = "actively-developed" }
 [dependencies]
 log = "0.4"
 serde = { version = "1.0", features = ["derive"] }
-thiserror = "1.0"
+thiserror = "2.0"
 toml="0.8"
 
 [dependencies.pcap-parser]