chore: bump serde_json from 1.0.67 to 1.0.68 (#19942)

* chore: bump serde_json from 1.0.67 to 1.0.68

Bumps [serde_json](https://github.com/serde-rs/json) from 1.0.67 to 1.0.68.
- [Release notes](https://github.com/serde-rs/json/releases)
- [Commits](https://github.com/serde-rs/json/compare/v1.0.67...v1.0.68)

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

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

* [auto-commit] Update all Cargo lock files

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: dependabot-buildkite <dependabot-buildkite@noreply.solana.com>

core/Cargo.toml

@@ -66,7 +66,7 @@ jsonrpc-core = "18.0.0"
 jsonrpc-core-client = { version = "18.0.0", features = ["ipc", "ws"] }
 matches = "0.1.9"
 reqwest = { version = "0.11.4", default-features = false, features = ["blocking", "rustls-tls", "json"] }
-serde_json = "1.0.67"
+serde_json = "1.0.68"
 serial_test = "0.5.1"
 solana-program-runtime = { path = "../program-runtime", version = "=1.8.0" }
 solana-stake-program = { path = "../programs/stake", version = "=1.8.0" }