bump pre commit and fix format (#373)

mlx/backend/metal/device.cpp

@@ -139,7 +139,7 @@ Device::~Device() {
 
 void Device::new_queue(int index) {
   auto thread_pool = metal::new_scoped_memory_pool();
-  
+
   // Multiple threads can ask the device for queues
   // We lock this as a critical section for safety
   const std::lock_guard<std::mutex> lock(mtx_);