build(deps): update hashbrown requirement in the cargo-crates group

Updates the requirements on [hashbrown](https://github.com/rust-lang/hashbrown) to permit the latest version.

Updates `hashbrown` to 0.15.0
- [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
  dependency-group: cargo-crates
...

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

Cargo.toml

@@ -69,7 +69,7 @@ diff = { version = "0.1.13", default-features = false }
 env_logger = { version = "0.11", default-features = false }
 epoll = { version = "4.3.3", default-features = false }
 futures = { version = "0.3.28", default-features = false }
-hashbrown = { version = "0.14.3", default-features = false }
+hashbrown = { version = "0.15.0", default-features = false }
 indoc = { version = "2.0", default-features = false }
 integration-ebpf = { path = "test/integration-ebpf", default-features = false }
 libc = { version = "0.2.105", default-features = false }