Update Rust crate ureq to v2.12.0

Author: renovate[bot]

src/Cargo.lock

@@ -15,7 +15,7 @@ qos_hex = { path = "../qos_hex" }
 qos_p256 = { path = "../qos_p256", features = ["mock"] }
 qos_test_primitives = { path = "../qos_test_primitives" }
 
-tokio = { version = "1.38.0", features = ["macros", "rt-multi-thread"], default-features = false }
+tokio = { version = "1.33", features = ["macros", "rt-multi-thread"], default-features = false }
 borsh = { version = "1.0", features = ["std", "derive"] , default-features = false}
 nix = { version = "0.26", features = ["socket"], default-features = false }
 rustls = { version = "0.23.5" }