Example mistakenly uses `oled.getFontWidth()` instead of `getFontHeight()`

SparkFun_Micro_OLED_Arduino_Library/examples/MicroOLED_Demo/MicroOLED_Demo.ino

Lines 322 to 324 in 6ccbba3

    
           // Try to set the cursor in the middle of the screen 
        
           oled.setCursor(middleX - (oled.getFontWidth() * (title.length()/2)), 
        
                          middleY - (oled.getFontWidth() / 2));

Fixed with c768ea4

	// Try to set the cursor in the middle of the screen
	oled.setCursor(middleX - (oled.getFontWidth() * (title.length()/2)),
	middleY - (oled.getFontWidth() / 2));