chore(deps): bump chrono from 0.4.43 to 0.4.44 in /reference-apps/rust

Bumps [chrono](https://github.com/chronotope/chrono) from 0.4.43 to 0.4.44.
- [Release notes](https://github.com/chronotope/chrono/releases)
- [Changelog](https://github.com/chronotope/chrono/blob/main/CHANGELOG.md)
- [Commits](chronotope/chrono@v0.4.43...v0.4.44)

---
updated-dependencies:
- dependency-name: chrono
  dependency-version: 0.4.44
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

reference-apps/rust/Cargo.lock

@@ -10,7 +10,7 @@ tokio = { version = "1.49", features = ["full"] }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 reqwest = { version = "=0.12.28", default-features = false, features = ["json", "rustls-tls-native-roots"] }
-chrono = { version = "=0.4.43" }
+chrono = { version = "=0.4.44" }
 log = "0.4"
 env_logger = "=0.11.8"
 tokio-postgres = "0.7"