Merge pull request #20864 from twbs/fix-20688

Update the grid table heading to clarify max width over width

diff --cc docs/layout/grid.md
index 5d37880c0f22c435ea00123fab53dbd43bb0c03c,68e0d86ec7e270e6e3e58f5a80bfa4a9409ceb0a..55607e464874cae7b9220fcad6028d191c9277ca
--- 1/docs/layout/grid.md
--- 2/docs/layout/grid.md
+++ b/docs/layout/grid.md
@@@ -91,11 -91,11 +91,11 @@@ See how aspects of the Bootstrap grid s
          <td colspan="4">Collapsed to start, horizontal above breakpoints</td>
        </tr>
        <tr>
-         <th class="text-nowrap" scope="row">Container width</th>
+         <th class="text-nowrap" scope="row">Max container width</th>
          <td>None (auto)</td>
 -        <td>576px</td>
 +        <td>540px</td>
          <td>720px</td>
 -        <td>940px</td>
 +        <td>960px</td>
          <td>1140px</td>
        </tr>
        <tr>