[MB-1272] Use markdown to format changelog
[MB-1272] Use markdown to format changelog

zhangqinghe/ios-library,ipmobiletech/ios-library,mikerowan/ios-library,manuyavuz/ios-library,manuyavuz/ios-library,manuyavuz/ios-library,ipmobiletech/ios-library,grosch/ios-library,zhangqinghe/ios-library,grosch/ios-library,mikerowan/ios-library,zhangqinghe/ios-library,ipmobiletech/ios-library,grosch/ios-library,mikerowan/ios-library