Update bindgen requirement from 0.66.1 to 0.69.1

Updates the requirements on [bindgen](https://github.com/rust-lang/rust-bindgen) to permit the latest version.
- [Release notes](https://github.com/rust-lang/rust-bindgen/releases)
- [Changelog](https://github.com/rust-lang/rust-bindgen/blob/main/CHANGELOG.md)
- [Commits](rust-lang/rust-bindgen@v0.66.1...v0.69.1)

---
updated-dependencies:
- dependency-name: bindgen
  dependency-type: direct:production
...

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

Cargo.toml

@@ -18,4 +18,4 @@ petgraph = "0.6.3"
 log = "0.4"
 
 [build-dependencies]
-bindgen = "0.66.1"
+bindgen = "0.69.1"