update grid options max container width in docs to reflect latest changes

css.html

@@ -130,9 +130,9 @@ base_url: "../"
           <tr>
             <th>Max container width</th>
             <td>None (auto)</td>
-            <td>720px</td>
-            <td>940px</td>
-            <td>1140px</td>
+            <td>750px</td>
+            <td>970px</td>
+            <td>1170px</td>
           </tr>
           <tr>
             <th>Class prefix</th>