Update zstd requirement from 0.9.0 to 0.13.0

Updates the requirements on [zstd](https://github.com/gyscos/zstd-rs) to permit the latest version.
- [Release notes](https://github.com/gyscos/zstd-rs/releases)
- [Commits](https://github.com/gyscos/zstd-rs/commits)

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

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

pingora-header-serde/Cargo.toml

@@ -22,7 +22,7 @@ name = "trainer"
 path = "src/trainer.rs"
 
 [dependencies]
-zstd = "0.9.0"
+zstd = "0.13.0"
 zstd-safe = "4.1.1"
 http = { workspace = true }
 bytes = { workspace = true }