fix rustdoc

Author: Ank4n

substrate/frame/staking/src/pallet/mod.rs

@@ -2551,7 +2551,7 @@ pub mod pallet {
 
 		/// Removes the legacy Staking locks if they exist.
 		///
-		/// This removes the legacy lock on the stake with [`T::OldCurrency`] and creates a hold on
+		/// This removes the legacy lock on the stake with [`Config::OldCurrency`] and creates a hold on
 		/// it if needed. If all stake cannot be held, the best effort is made to hold as much as
 		/// possible. The remaining stake is forced withdrawn from the ledger.
 		///