build(deps): update bindgen requirement from =0.69.2 to =0.69.4

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@v0.69.2...v0.69.4)

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

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

generator/Cargo.toml

@@ -9,7 +9,7 @@ publish = false
 # Pin version to have control over how ash/src/vk/native.rs
 # is generated (there is a CI check that validates that this
 # file is generated as currently checked in): 
-bindgen = "=0.69.2"
+bindgen = "=0.69.4"
 heck = "0.4"
 itertools = "0.12"
 nom = "7.1"