feat(espnow): By default keep the peer when sending fails

Author: P-R-O-C-H-Y

Diff for: libraries/ESP_NOW/src/ESP32_NOW_Serial.h

@@ -23,7 +23,7 @@ class ESP_NOW_Serial_Class : public Stream, public ESP_NOW_Peer {
   size_t tryToSend();
 
 public:
-  ESP_NOW_Serial_Class(const uint8_t *mac_addr, uint8_t channel, wifi_interface_t iface = WIFI_IF_AP, const uint8_t *lmk = NULL, bool remove_on_fail = true);
+  ESP_NOW_Serial_Class(const uint8_t *mac_addr, uint8_t channel, wifi_interface_t iface = WIFI_IF_AP, const uint8_t *lmk = NULL, bool remove_on_fail = false);
   ~ESP_NOW_Serial_Class();
   size_t setRxBufferSize(size_t);
   size_t setTxBufferSize(size_t);