Bump serde_json from 1.0.69 to 1.0.71 in /blacksmith (#581)

Bumps [serde_json](https://github.com/serde-rs/json) from 1.0.69 to 1.0.71.
- [Release notes](https://github.com/serde-rs/json/releases)
- [Commits](serde-rs/json@v1.0.69...v1.0.71)

---
updated-dependencies:
- dependency-name: serde_json
  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>

Author: dependabot[bot]

blacksmith/Cargo.lock

@@ -13,7 +13,7 @@ log = "0.4.14"
 regex = "1.5.4"
 reqwest = { version = "0.11", features = ["blocking"] }
 serde = { version = "1.0.130", features = ["derive"] }
-serde_json = "1.0.69"
+serde_json = "1.0.71"
 toml = "0.5.8"
 
 [dependencies.clap]