fix code sample in the Form component doc (issue #9591) (#9705)
fix code sample in the Form component doc (issue #9591) (#9705)

* fix code sample in the Form component doc (issue #9591)

* fix wrong space indent

* add trailing comma

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