docs: fix typos in doc comments flagged in review

Author: pbeza

crates/near-mpc-crypto-types/src/sign.rs

@@ -203,7 +203,7 @@ mod tests {
         assert_eq!(args.payload.as_ecdsa().unwrap(), &ecdsa_payload_bytes());
     }
 
-    /// A a sign request whose `payload` field is
+    /// A sign request whose `payload` field is
     /// a raw 32-byte array (no [`Ecdsa`] / [`Eddsa`] tag) — the legacy on-chain
     /// wire format predating EdDSA support — must be deserialized as
     /// [`Payload::Ecdsa`]

crates/threshold-signatures/src/protocol/echo_broadcast.rs

@@ -16,9 +16,8 @@ pub enum MessageType<T> {
     Ready(T),
 }
 
-/// A homemade sturcture that allows counting the number of
-/// votes gathered during the reliable-broadcast protocol
-/// only requiring from votes to have trait [`PartialEq`]
+/// Counts the votes gathered during the reliable-broadcast protocol,
+/// requiring only [`PartialEq`] from the vote type
 #[derive(Clone)]
 struct CounterList<T> {
     list: Vec<(T, usize)>,