Update hashbrown requirement from 0.14 to 0.15

Updates the requirements on [hashbrown](https://github.com/rust-lang/hashbrown) to permit the latest version.
- [Changelog](https://github.com/rust-lang/hashbrown/blob/master/CHANGELOG.md)
- [Commits](rust-lang/hashbrown@v0.14.0...v0.15.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

Cargo.toml

@@ -22,7 +22,7 @@ serde = ["glam/serde", "bvh2d/serde", "dep:serde"]
 
 [dependencies]
 tracing = { version = "0.1", optional = true }
-hashbrown = { version = "0.14" }
+hashbrown = { version = "0.15" }
 glam = { version = "0.27", features = ["approx"] }
 smallvec = { version = "1.13", features = ["union", "const_generics"] }
 bvh2d = { version = "0.5", git = "https://github.com/mockersf/bvh2d" }