SX1268 frequency initialization regardless of the region

Otherwise, we get critical error 3 with result code -12 (ERR_INVALID_FREQUENCY):
The supplied frequency value is invalid for this module.

src/mesh/SX1268Interface.h

@@ -10,6 +10,9 @@ class SX1268Interface : public RadioLibInterface
     SX1268 lora;
 
   public:
+    /// Initializing the frequency of the SX1268 module regardless of the region
+    float freq = 433.0;
+
     SX1268Interface(RADIOLIB_PIN_TYPE cs, RADIOLIB_PIN_TYPE irq, RADIOLIB_PIN_TYPE rst, RADIOLIB_PIN_TYPE busy, SPIClass &spi);
 
     /// Initialise the Driver transport hardware and software.