Solving *"wifi:channel=0 is invalid"* when using FTM example code (#5809)

When using the FTM examples I got an error in the FTM_Initiator.ino:

*"wifi:channel=0 is invalid"*

I solved it for myself by simply passing the channel argument to be 1 in *WiFi.initiateFTM*. However, a better fix would be to directly change the default channel here.

libraries/WiFi/src/WiFiGeneric.h

@@ -172,7 +172,7 @@ class WiFiGenericClass
     bool setTxPower(wifi_power_t power);
     wifi_power_t getTxPower();
 
-    bool initiateFTM(uint8_t frm_count=16, uint16_t burst_period=2, uint8_t channel=0, const uint8_t * mac=NULL);
+    bool initiateFTM(uint8_t frm_count=16, uint16_t burst_period=2, uint8_t channel=1, const uint8_t * mac=NULL);
 
     static const char * getHostname();
     static bool setHostname(const char * hostname);