Update hashbrown to 0.14 (#438)

Author: fornwall

metrics-util/Cargo.toml

@@ -58,7 +58,7 @@ radix_trie = { version = "0.2", default-features = false, optional = true }
 ordered-float = { version = "4.2", default-features = false, optional = true }
 num_cpus = { version = "1", default-features = false, optional = true }
 ahash = { version = "0.8", default-features = false, optional = true }
-hashbrown = { version = "=0.13.1", default-features = false, optional = true, features = ["ahash"] }
+hashbrown = { version = "0.14", default-features = false, optional = true, features = ["ahash"] }
 
 [dev-dependencies]
 approx = "0.5"