test(data_table): match checked boolean attribute regardless of order in column toggle test

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: pierry01

gem/test/ruby_ui/data_table_column_toggle_test.rb

@@ -34,7 +34,7 @@ def test_column_can_start_hidden
         {key: :salary, label: "Salary", visible: false}
       ])
     end
-    # only the visible column renders the `checked` attribute on its checkbox
-    assert_equal 1, output.scan("checked class=").length
+    # only the visible column renders the `checked` boolean attribute on its checkbox
+    assert_equal 1, output.scan(/\bchecked(?:\s|>)/).length
   end
 end