docs: fix demo riddle button not display
docs: fix demo riddle button not display

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