refactor: clean up NotifyWorker function formatting in CInstantSendManager

Adjusted the formatting of the NotifyWorker function in CInstantSendManager for improved readability. This change includes consistent spacing and indentation, enhancing code maintainability without altering functionality.

Author: PastaPastaPasta

src/instantsend/instantsend.h

@@ -137,9 +137,9 @@ class CInstantSendManager final : public instantsend::InstantSendSignerParent
 
     void WorkThreadMain(PeerManager& peerman)
         EXCLUSIVE_LOCKS_REQUIRED(!cs_nonLocked, !cs_pendingLocks, !cs_pendingRetry);
-    void NotifyWorker() { 
+    void NotifyWorker() {
         workEpoch.fetch_add(1, std::memory_order_acq_rel);
-        workCv.notify_one(); 
+        workCv.notify_one();
     }
 
     void HandleFullyConfirmedBlock(const CBlockIndex* pindex)