Update cheat-sheet.md

Author: jacobhylen

content/hardware/02.hero/boards/uno-r4-minima/tutorials/cheat-sheet/cheat-sheet.md

@@ -405,7 +405,7 @@ This is one of the few things that are distinctly different from UNO R3 to UNO R
 
 ### Native USB
 
-Sending serial data to your computer is done using the standard `Serial` object. I
+Sending serial data to your computer is done using the standard `Serial` object. 
 
 ```arduino
 Serial.begin(9600);