Fix typo

Author: malcolm-sparkfun

README.md

@@ -98,9 +98,9 @@ circup install --py qwiic_keypad
 
 If you would like to install any of the examples from this repository, issue the corresponding circup command from below. (NOTE: The below syntax assumes you are using CircUp on Windows. Linux and Mac will have different path seperators (i.e. "/" vs. "\"). See the [CircUp "example" command documentation](https://learn.adafruit.com/keep-your-circuitpython-libraries-on-devices-up-to-date-with-circup/example-command) for more information)
 ```sh
-circup example qwiic_keypad\qwiic_keypad_ex1.py
-circup example qwiic_keypad\qwiic_keypad_ex2.py
-circup example qwiic_keypad\qwiic_keypad_ex3.py
+circup example qwiic_keypad\qwiic_keypad_ex1
+circup example qwiic_keypad\qwiic_keypad_ex2
+circup example qwiic_keypad\qwiic_keypad_ex3
 ```
 
 Example Use