Fixed missing td tag (#1010)

docs/documentation/modifiers/typography-helpers.html

@@ -290,7 +290,7 @@ doc-subtab: typography-helpers
       <tbody>
       <tr>
         <td><code>.is-capitalized</code></td>
-        Transforms <strong>the first character</strong> of each word to <strong>uppercase</strong>
+        <td>Transforms <strong>the first character</strong> of each word to <strong>uppercase</strong></td>
       </tr>
       <tr>
         <td><code>.is-lowercase</code></td>