avoid the compiler warning of -Wreorder

Author: yaoxinliu

include/cppcoro/shared_task.hpp

@@ -74,8 +74,8 @@ namespace cppcoro
 		public:
 
 			shared_task_promise_base() noexcept
-				: m_waiters(&this->m_waiters)
-				, m_refCount(1)
+				: m_refCount(1)
+				, m_waiters(&this->m_waiters)				
 				, m_exception(nullptr)
 			{}