add missing atomic include

Author: MarcoFalke

src/node/blockstorage.h

@@ -5,12 +5,13 @@
 #ifndef BITCOIN_NODE_BLOCKSTORAGE_H
 #define BITCOIN_NODE_BLOCKSTORAGE_H
 
-#include <cstdint>
-#include <vector>
-
 #include <fs.h>
 #include <protocol.h> // For CMessageHeader::MessageStartChars
 
+#include <atomic>
+#include <cstdint>
+#include <vector>
+
 class ArgsManager;
 class BlockValidationState;
 class CBlock;