chore: remove redundant words in comment

Signed-off-by: TechVest <techdashen@qq.com>

crates/cdk-cli/src/sub_commands/receive.rs

@@ -30,7 +30,7 @@ pub struct ReceiveSubCommand {
     /// Nostr relay
     #[arg(short, long, action = clap::ArgAction::Append)]
     relay: Vec<String>,
-    /// Unix time to to query nostr from
+    /// Unix time to query nostr from
     #[arg(long)]
     since: Option<u64>,
     /// Preimage

crates/cdk/src/mint/mint_nut04.rs

@@ -311,7 +311,7 @@ impl Mint {
             }
         };
 
-        // We check the the total value of blinded messages == mint quote
+        // We check the total value of blinded messages == mint quote
         if amount != mint_quote.amount {
             return Err(Error::TransactionUnbalanced(
                 mint_quote.amount.into(),