Add 1 retransmission for intermediate hops when using NextHopRouter

src/mesh/ReliableRouter.h

@@ -1,7 +1,6 @@
 #pragma once
 
 #include "NextHopRouter.h"
-#include <unordered_map>
 
 /**
  * This is a mixin that extends Router with the ability to do (one hop only) reliable message sends.
@@ -32,4 +31,6 @@ class ReliableRouter : public NextHopRouter
      * We hook this method so we can see packets before FloodingRouter says they should be discarded
      */
     virtual bool shouldFilterReceived(const meshtastic_MeshPacket *p) override;
+
+    constexpr static uint8_t NUM_RETRANSMISSIONS = 3;
 };