fix(deps): update rust crate lru to 0.16 (#56)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

crates/flagd/Cargo.toml

@@ -42,7 +42,7 @@ prost-types = "0.13"
 tokio = { version = "1.45", features = ["full"] }
 serde_json = "1.0"
 serde = { version = "1.0", features = ["derive"] }
-lru = "0.14"
+lru = "0.16"
 futures = "0.3"
 reqwest = { version = "0.12", default-features = false, features = ["json", "stream", "rustls-tls"] }
 tracing = "0.1"