build(deps): bump rustler from 0.31.0 to 0.32.1 in /native/rhai_rustler

Bumps [rustler](https://github.com/rusterlium/rustler) from 0.31.0 to 0.32.1.
- [Release notes](https://github.com/rusterlium/rustler/releases)
- [Changelog](https://github.com/rusterlium/rustler/blob/master/CHANGELOG.md)
- [Commits](rusterlium/rustler@rustler-0.31.0...rustler-0.32.1)

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

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

Author: dependabot[bot]

native/rhai_rustler/Cargo.lock

@@ -13,7 +13,7 @@ crate-type = ["cdylib"]
 rhai = { version = "=1.17.1", features = ["sync"] }
 rhai-dylib = { version = "0.2.1", features = ["sync"] }
 thiserror = "1.0.56"
-rustler = "0.31.0"
+rustler = "0.32.1"
 
 [features]
 nif_version_2_15 = ["rustler/nif_version_2_15"]