docs: fix layout demo style
docs: fix layout demo style

icaife/ant-design,ant-design/ant-design,icaife/ant-design,icaife/ant-design,zheeeng/ant-design,ant-design/ant-design,elevensky/ant-design,zheeeng/ant-design,zheeeng/ant-design,elevensky/ant-design,zheeeng/ant-design,icaife/ant-design,ant-design/ant-design,elevensky/ant-design,elevensky/ant-design,ant-design/ant-design