message: docs: update date pipe example for minutes and seconds
  PR Close
diff: @@ -125,7 +125,7 @@ import {invalidPipeArgumentError} from './invalid_pipe_argument_error';
  * {{ dateObj | date }} // output is 'Jun 15, 2015'
  * {{ dateObj | date:'medium' }} // output is 'Jun 15, 2015, 9:43:11 PM'
  * {{ dateObj | date:'shortTime' }} // output is '9:43 PM'
  - * {{ dateObj | date:'mmss' }} // output is '43:11'
  + * {{ dateObj | date:'mm:ss' }} // output is '43:11'
  * ```
  *
  * ### Usage example
  