Fix forwarding in ParkingLot<T>::WaitNode ctor

Summary: [Folly] Fix forwarding in `ParkingLot<T>::WaitNode` ctor.

Reviewed By: aary

Differential Revision: D9478603

fbshipit-source-id: 1da4c985bee7293356b1f5e1b43678282703b8ce

folly/synchronization/ParkingLot.h

@@ -168,7 +168,7 @@ class ParkingLot {
 
     template <typename D>
     WaitNode(uint64_t key, uint64_t lotid, D&& data)
-        : WaitNodeBase(key, lotid), data_(std::forward<Data>(data)) {}
+        : WaitNodeBase(key, lotid), data_(std::forward<D>(data)) {}
   };
 
  public: