Bump serde_json from 1.0.134 to 1.0.138

Bumps [serde_json](https://github.com/serde-rs/json) from 1.0.134 to 1.0.138.
- [Release notes](https://github.com/serde-rs/json/releases)
- [Commits](serde-rs/json@v1.0.134...v1.0.138)

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

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

Author: dependabot[bot]

Cargo.lock

@@ -11,7 +11,7 @@ repository = "https://github.com/robertknight/ocrs"
 [dependencies]
 image = { version = "0.25.5", default-features = false, features = ["png", "jpeg", "webp"] }
 png = "0.17.16"
-serde_json = "1.0.134"
+serde_json = "1.0.138"
 rten = { workspace = true }
 rten-imageproc = { workspace = true }
 rten-tensor = { workspace = true }