[SX126x] Fixed units in example

examples/SX126x/SX126x_Receive/SX126x_Receive.ino

@@ -89,7 +89,7 @@ void loop() {
     // of the last received packet
     Serial.print(F("[SX1262] SNR:\t\t"));
     Serial.print(lora.getSNR());
-    Serial.println(F(" dBm"));
+    Serial.println(F(" dB"));
 
   } else if (state == ERR_RX_TIMEOUT) {
     // timeout occurred while waiting for a packet

examples/SX126x/SX126x_Receive_Interrupt/SX126x_Receive_Interrupt.ino

@@ -136,7 +136,7 @@ void loop() {
       // print SNR (Signal-to-Noise Ratio)
       Serial.print(F("[SX1262] SNR:\t\t"));
       Serial.print(lora.getSNR());
-      Serial.println(F(" dBm"));
+      Serial.println(F(" dB"));
 
     } else if (state == ERR_CRC_MISMATCH) {
       // packet was received, but is malformed