Add torchao docs link (#1898)

* Add torchao docs link

Author: jainapurva

pytorch-domains.html

@@ -102,6 +102,13 @@ <h4>ExecuTorch</h4>
             </p>
           </a>
         </div>
+        <div class="col-sm-5 domain-card">
+          <a href="https://pytorch.org/ao/stable/index.html">
+            <h4>torchao</h4>
+            <p>torchao is a library for custom data types and optimizations. Quantize and sparsify weights, gradients, optimizers and activations for inference and training using native PyTorch.
+            </p>
+          </a>
+        </div>
       </div>
     </div>
   </div>