add leave a review in settings

Author: zubyj

src/popup/settings.html

@@ -34,6 +34,12 @@ <h2 class="title">Settings</h2>
     <button id="show-rating-btn" class="material-button settings-btn">
         <span id="show-rating-icon"> </span> Show Rating
     </button>
+    <div>
+        <a target="_blank"
+            href="https://chrome.google.com/webstore/detail/leetcode-explained/cofoinjfjcpgcjiinjhcpomcjoalijbe">
+            Leave a Review
+        </a>
+    </div>
 </body>
 
 </html>