message: fix: progress example update
diff: import React from 'react';
  -import { Box, Progress, VStack } from 'native-base';
  +import { Box, Progress, VStack, Heading } from 'native-base';
  export default function () {
  return (
  <Box w="90%">
  <VStack space="md">
  + <Heading textAlign="center" mb={8}>
  + Progress ColorScheme
  + </Heading>
  <Progress colorScheme="primary" value={35} />
  <Progress colorScheme="secondary" value={45} />
  <Progress colorScheme="emerald" value={55} />
  