chore(deps): bump serde_json in /src/user-management-service (#460)

Bumps [serde_json](https://github.com/serde-rs/json) from 1.0.140 to 1.0.143.
- [Release notes](https://github.com/serde-rs/json/releases)
- [Commits](serde-rs/json@v1.0.140...v1.0.143)

---
updated-dependencies:
- dependency-name: serde_json
  dependency-version: 1.0.143
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

src/user-management-service/Cargo.lock

@@ -24,7 +24,7 @@ members = [
 thiserror = "2.0.16"
 tokio = { version = "1", features = ["macros", "rt-multi-thread"] }
 serde = "1.0.219"
-serde_json = "1.0.140"
+serde_json = "1.0.143"
 tracing-subscriber = "0.3.20"
 opentelemetry = { version = "0.23", features = ["trace"] }
 opentelemetry-datadog = { version = "0.11.0", features = ["reqwest-client"] }