Fix state buffer queue include order

Author: Trinkle23897

envpool/core/state_buffer_queue.h

@@ -20,8 +20,8 @@
 #include <algorithm>
 #include <cstdint>
 #include <list>
-#include <mutex>
 #include <memory>
+#include <mutex>
 #include <thread>
 #include <utility>
 #include <vector>