add github link

Author: salahlalami

index.html

@@ -37,7 +37,8 @@ <h1>Lightweight vanilla js modal component</h1>
         <p>
           This is just 2kb Lightweight vanilla js modal component with zero
           dependencies , with option esc close , outside click close , custom
-          height , widht
+          height , widht : check code in github :
+          https://github.com/idurar/vanilla-js-modal
         </p>
         <button class="openModal">Open Modal</button>
       </center>