chore(deps): update lz4_flex requirement in /veza-stream-server

Updates the requirements on [lz4_flex](https://github.com/pseitz/lz4_flex) to permit the latest version.
- [Release notes](https://github.com/pseitz/lz4_flex/releases)
- [Changelog](https://github.com/PSeitz/lz4_flex/blob/main/CHANGELOG.md)
- [Commits](https://github.com/pseitz/lz4_flex/compare/0.11...0.12.0)

---
updated-dependencies:
- dependency-name: lz4_flex
  dependency-version: 0.12.0
  dependency-type: direct:production
...

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

veza-stream-server/Cargo.toml

@@ -71,7 +71,7 @@ dasp = "0.11"
 
 # Compression
 brotli = "3.4"
-lz4_flex = "0.11"
+lz4_flex = "0.12"
 zstd = "0.13"
 
 # Database & Cache