Rust - Bump serde_json from 1.0.120 to 1.0.128 in /rust-lambda

Bumps [serde_json](https://github.com/serde-rs/json) from 1.0.120 to 1.0.128.
- [Release notes](https://github.com/serde-rs/json/releases)
- [Commits](serde-rs/json@v1.0.120...1.0.128)

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

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