Update rust/threshold-schnorr/README.md

Author: jessiemongeon1

Diff for: rust/threshold-schnorr/README.md

@@ -129,7 +129,7 @@ URLs:
     schnorr_example_rust: https://a4gq6-oaaaa-aaaab-qaa4q-cai.raw.icp0.io/?id=enb64-iaaaa-aaaap-ahnkq-cai
 ```
 
-The implementation of this canister in Rust is (`schnorr_example_rust`) is
+The implementation of this canister in Rust (`schnorr_example_rust`) is
 deployed on mainnet. It has the URL
 https://a4gq6-oaaaa-aaaab-qaa4q-cai.raw.icp0.io/?id=enb64-iaaaa-aaaap-ahnkq-cai
 and serves up the Candid web UI for this particular canister deployed on