VRF: use serde from workspace

Author: dannywillems

vrf/Cargo.toml

@@ -20,7 +20,7 @@ num = { version = "0.4", features = ["std"] }
 o1-utils = { workspace = true }
 poseidon = { workspace = true }
 redux = { workspace = true }
-serde = "1.0.147"
+serde = { workspace = true }
 serde_json = { version = "1.0.82", features = [
   "unbounded_depth",
   "arbitrary_precision",