Bump the known_good_semver group with 2 updates (#1485)

Bumps the known_good_semver group with 2 updates: [serde_json](https://github.com/serde-rs/json) and [syn](https://github.com/dtolnay/syn).


Updates `serde_json` from 1.0.105 to 1.0.106
- [Release notes](https://github.com/serde-rs/json/releases)
- [Commits](https://github.com/serde-rs/json/compare/v1.0.105...v1.0.106)

Updates `syn` from 2.0.31 to 2.0.32
- [Release notes](https://github.com/dtolnay/syn/releases)
- [Commits](https://github.com/dtolnay/syn/compare/2.0.31...2.0.32)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

polkadot/runtime/parachains/Cargo.toml

@@ -62,7 +62,7 @@ test-helpers = { package = "polkadot-primitives-test-helpers", path = "../../pri
 sp-tracing = { path = "../../../substrate/primitives/tracing" }
 thousands = "0.2.0"
 assert_matches = "1"
-serde_json = "1.0.96"
+serde_json = "1.0.106"
 
 [features]
 default = [ "std" ]