fix: add ?Sized bound to z_serialize

zenoh-ext/src/serialization.rs

@@ -45,7 +45,7 @@ pub trait Deserialize: Sized {
     }
 }
 
-pub fn z_serialize<T: Serialize>(t: &T) -> ZBytes {
+pub fn z_serialize<T: Serialize + ?Sized>(t: &T) -> ZBytes {
     let mut zbytes = ZBytes::new();
     ZSerializer::new(&mut zbytes).serialize(t);
     zbytes