build(deps): bump serde_json in /third_party/sdmmparser/src

Bumps [serde_json](https://github.com/serde-rs/json) from 1.0.103 to 1.0.104.
- [Release notes](https://github.com/serde-rs/json/releases)
- [Commits](serde-rs/json@v1.0.103...v1.0.104)

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

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

third_party/sdmmparser/src/Cargo.toml

@@ -11,7 +11,7 @@ crate-type = ["staticlib"]
 [dependencies]
 serde = "1.0.175"
 serde_derive = "1.0.137"
-serde_json = "1.0.103"
+serde_json = "1.0.104"
 png = "0.17.9"
 
 [dependencies.dreammaker]