Added library manager link (with search) to correct keypad library

for easily finding the correct library you need to compile this firmware. Note, the search actually uses words that are unique to the library "sentence".

Author: Pete Lewis

Firmware/Qwiic_KeyPad/Qwiic_KeyPad.ino

@@ -52,6 +52,8 @@ const byte addr = 9; //Addr jumper
 const byte interruptPin = 7; //Pin goes low when a button event is available
 
 #include <Keypad.h>   // by Mark Stanley and Alexander Brevig 
+                      // Click here to get the library: http://librarymanager/All#Keypad_matrix_style
+                      // Note, if the search above doesn't work, try just "keypad" and find the correct one.
 const byte ROWS = 4;
 const byte COLS = 3;
 char keys[ROWS][COLS] = {