Open .NET Foundation link in new window

en/template/partials/footer.tmpl.partial

@@ -3,7 +3,7 @@
 <footer>
   <div class="inner-footer">
     <p><a href="#top">Back to top</a></p>
-    <p>Copyright © 2019-2021 .NET Foundation and Contributors<br>Supported by the <a href="https://dotnetfoundation.org">.NET Foundation</a></p>
+    <p>Copyright © 2019-2021 .NET Foundation and Contributors<br>Supported by the <a href="https://dotnetfoundation.org" target="_blank">.NET Foundation</a></p>
   </div>
 </footer>
 <script src="//stride3d.net/scripts/theme.js" type="text/javascript"></script>