Update index.html

Author: manhtai

index.html

@@ -159,6 +159,10 @@ <h2>PlainPrinter</h2>
           <h2>Mememe</h2>
           <p>Meme for Slack</p>
         </a>
+        <a class="product-item" href="https://mergum.com">
+          <h2>Mergum</h2>
+          <p>Merging. Simplified.</p>
+        </a>
       </section>
     </main>
     <footer class="footer">