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...2.0.0)

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

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

Cargo.toml

@@ -21,7 +21,7 @@ codecov = { repository = "petabi/petal-neighbors", service = "github" }
 ndarray = "0.16"
 num-traits = "0.2"
 ordered-float = "4"
-thiserror = "1"
+thiserror = "2"
 
 [dev-dependencies]
 approx = "0.5"