exclude tables (#83)

* exclude tables

add information from joomla/joomla-cms#39828

* Update table-columns.md

Author: brianteeman

docs/using-core-functions/table-columns.md

@@ -40,5 +40,8 @@ $wa = $this->document->getWebAssetManager();
 $wa->useScript('table.columns');
 ```
 
-### Note
+### Notes
 Your table will need to be a valid html table with a `<thead>` and each column a `<th>`.
+
+If you have multiple tables on the page and you want to prevent the script loading on one of those tables then you can add the class "columns-order-ignore" to the table.
+