build(deps): bump serial_test from 3.1.1 to 3.2.0 (#7481)

Bumps [serial_test](https://github.com/palfrey/serial_test) from 3.1.1 to 3.2.0.
- [Release notes](https://github.com/palfrey/serial_test/releases)
- [Commits](palfrey/serial_test@v3.1.1...v3.2.0)

---
updated-dependencies:
- dependency-name: serial_test
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

program/Cargo.toml

@@ -24,7 +24,7 @@ thiserror = "2.0"
 [dev-dependencies]
 lazy_static = "1.5.0"
 proptest = "1.5"
-serial_test = "3.1.1"
+serial_test = "3.2.0"
 solana-program-test = "2.1.0"
 solana-sdk = "2.1.0"