Update index.en-US.md
Update index.en-US.md

add missing prop `showTitle` in documentation of Pagination
icaife/ant-design,elevensky/ant-design,ant-design/ant-design,ant-design/ant-design,zheeeng/ant-design,ant-design/ant-design,ant-design/ant-design,icaife/ant-design,zheeeng/ant-design,elevensky/ant-design,icaife/ant-design,zheeeng/ant-design,elevensky/ant-design,zheeeng/ant-design,elevensky/ant-design,icaife/ant-design