add parameter name to h for better reading

Author: Links2004

cores/esp8266/Updater.h

@@ -26,7 +26,7 @@ class UpdaterClass {
       Call this to check the space needed for the update
       Will return false if there is not enough space
     */
-    bool begin(size_t size, int = U_FLASH);
+    bool begin(size_t size, int command = U_FLASH);
 
     /*
       Writes a buffer to the flash and increments the address