Return Address when deploy not BytesN<32> (#949)

### What
Return `Address` from `deploy` not `BytesN<32>`.

### Why
In #947 we replaced usage
of BytesN<32> with Address for contract IDs, but I missed this one case.

soroban-sdk/src/deploy.rs

@@ -102,15 +102,16 @@ impl DeployerWithCurrentContract {
     /// will be used to derive a contract ID for the deployed contract.
     ///
     /// Returns the deployed contract's ID.
-    pub fn deploy(&self, wasm_hash: &impl IntoVal<Env, BytesN<32>>) -> BytesN<32> {
+    pub fn deploy(&self, wasm_hash: &impl IntoVal<Env, BytesN<32>>) -> Address {
         let env = &self.env;
         let id = env
             .create_contract_from_contract(
                 wasm_hash.into_val(env).to_object(),
                 self.salt.to_object(),
             )
             .unwrap_infallible();
-        unsafe { BytesN::<32>::unchecked_new(env.clone(), id) }
+        let id = unsafe { BytesN::<32>::unchecked_new(env.clone(), id) };
+        Address::from_contract_id(&id)
     }
 }