[Docs] Update feature_haptic_feedback.md (qmk#11859)

Arduino playground link to wiring diagram no longer works. Changed the link to point to the correct Adafruit hosted diagram pdf.

docs/feature_haptic_feedback.md

@@ -39,7 +39,7 @@ Not all keycodes below will work depending on which haptic mechanism you have ch
 
 First you will need a build a circuit to drive the solenoid through a mosfet as most MCU will not be able to provide the current needed to drive the coil in the solenoid.
 
-[Wiring diagram provided by Adafruit](https://playground.arduino.cc/uploads/Learning/solenoid_driver.pdf)
+[Wiring diagram provided by Adafruit](https://cdn-shop.adafruit.com/product-files/412/solenoid_driver.pdf)
 
 
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