bugfixed:RSUITE-101 【Message】Message组件中Description属性对应的文字颜色设置有误，预期：#575757，实际：#272c36
bugfixed:RSUITE-101 【Message】Message组件中Description属性对应的文字颜色设置有误，预期：#575757，实际：#272c36

rsuite/rsuite-theme,suitejs/suite-theme-pagurian,suitejs/suite-theme-pagurian