build(deps): Bump serde_json in /functional-tests in the rust group

Bumps the rust group in /functional-tests with 1 update: [serde_json](https://github.com/serde-rs/json).


Updates `serde_json` from 1.0.140 to 1.0.142
- [Release notes](https://github.com/serde-rs/json/releases)
- [Commits](serde-rs/json@v1.0.140...v1.0.142)

---
updated-dependencies:
- dependency-name: serde_json
  dependency-version: 1.0.142
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: rust
...

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

Author: dependabot[bot]

functional-tests/Cargo.lock

@@ -7,7 +7,7 @@ authors = ["Adrian Utrilla <[email protected]>"]
 [dependencies]
 tempfile = "3.20.0"
 serde = "1.0"
-serde_json = "1.0.140"
+serde_json = "1.0.142"
 serde_yaml = "0.9.34"
 serde_derive = "1.0"
 lazy_static = "1.5.0"