fix(timeline): #2809 Fix docs typo in `showNested` (#2879)

docs/timeline/index.html

@@ -468,10 +468,10 @@ var groups = [
       <td>Array of group ids nested in the group. Nested groups will appear under this nesting group.</td>
     </tr>
      <tr>
-      <td>showNestedGroups</td>
+      <td>showNested</td>
       <td>Boolean</td>
       <td>no</td>
-      <td>Assuming the group has nested groups, this will set the initial state of the group - shown or collapsed. The <code>showNestedGroups</code> is defaulted to <code>true</code>.</td>
+      <td>Assuming the group has nested groups, this will set the initial state of the group - shown or collapsed. The <code>showNested</code> is defaulted to <code>true</code>.</td>
     </tr>
   </table>