Hotfix: CMD_SEND_RAW_PACKET not freeing packet on parse failure.

https://github.com/meshcore-dev/MeshCore/pull/2722

examples/companion_radio/MyMesh.cpp

@@ -2010,6 +2010,7 @@ void MyMesh::handleCmdFrame(size_t len) {
         sendPacket(pkt, priority, 0);
         writeOKFrame();
       } else {
+        releasePacket(pkt);
         writeErrFrame(ERR_CODE_ILLEGAL_ARG);
       }
     } else {