Update hashbrown requirement from 0.14.3 to 0.15.0

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@v0.14.3...v0.15.0)

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

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

Cargo.toml

@@ -33,5 +33,5 @@ prohibit-unsafe = []
 utf16 = []
 
 [dependencies]
-hashbrown = "0.14.3"
+hashbrown = "0.15.0"
 memchr = { version = "2.4.0", default-features = false }