Add'l demos

Author: earlephilhower

README.md

@@ -123,6 +123,7 @@ Here are some links to coverage and additional tutorials for using `arduino-pico
 * Arduino Support for the Pi Pico available! And how fast is the Pico? - https://youtu.be/-XHh17cuH5E
 * Pre-release Adafruit QT Py RP2040 - https://www.youtube.com/watch?v=sfC1msqXX0I
 * Adafruit Feather RP2040 running LCD + TMP117 - https://www.youtube.com/watch?v=fKDeqZiIwHg
+* Demonstration of Servos and I2C in Korean - https://cafe.naver.com/arduinoshield/1201
 
 # Contributing
 If you want to contribute or have bugfixes, drop me a note at <earlephilhower@yahoo.com> or open an issue/PR here.