build(deps): update thiserror requirement in /flipt-evaluation (#511)

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@1.0.50...2.0.3)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

flipt-evaluation/Cargo.toml

@@ -17,7 +17,7 @@ serde = { version = "1.0.147", features = ["derive"] }
 serde_json = { version = "1.0.89", features = ["raw_value"] }
 uuid = { version = "1.5.0", features = ["v4"] }
 crc32fast = "1.3.2"
-thiserror = "1.0.50"
+thiserror = "2.0.3"
 chrono = { version = "0.4.31", features = ["serde"] }
 web-time = "1.1.0"