Updated Default configuration (markdown)

Default-configuration.md

@@ -216,8 +216,8 @@ SX126x::setDio2AsRfSwitch(true);
 * Other:
   * Over-current protection: 60 mA
   * LoRa CRC: enabled
-* Inaccessible:
   * LoRa header mode: explicit
+* Inaccessible:
   * Frequency hopping: disabled
 
 Equivalent to (assuming SX1278):
@@ -225,6 +225,7 @@ Equivalent to (assuming SX1278):
 SX1278::begin(434.0, 125.0, 9, 7, SX127X_SYNC_WORD, 10, 8, 0);
 SX1278::setCurrentLimit(60);
 SX1278::setCRC(true);
+SX1278::explicitHeader();
 ```
 
 ### SX127x/RFM9x - FSK modem