Updated layout.html (#33688)

Grammatically updated HTML  Footer, Adding a period in the 89th line.

Author: mayank98x

web/pandas/_templates/layout.html

@@ -86,7 +86,7 @@
                 </li>
             </ul>
             <p>
-                pandas is a fiscally sponsored project of <a href="https://numfocus.org">NumFOCUS</a>
+                pandas is a fiscally sponsored project of <a href="https://numfocus.org">NumFOCUS.</a>
             </p>
         </footer>