Merge pull request #394 from plotly/fix-link

Add new newsletter link

Author: LiamConnors

_includes/layouts/_footer-main.html

@@ -9,7 +9,7 @@ <h6 style="color:#119dff" class="--footer-heading">JOIN OUR MAILING LIST</h6>&#x
             <li>
               <p class="subscribe-text"> Sign up to stay in the loop with all things Plotly — from Dash Club to product
                 updates, webinars, and more!</p>
-              <a href="https://go.plot.ly/subscription?utm_medium=graphing_libraries&utm_content=footer" class="subscribe-button" target="_blank">
+              <a href="https://plotly.com/newsletter/?utm_medium=graphing_libraries&utm_content=footer" class="subscribe-button" target="_blank">
                 Subscribe
               </a>
             </li>