Fix export const in readme-update-version (#6758)

Author: alex-page

polaris-react/scripts/readme-update-version.js

@@ -9,7 +9,7 @@ const {semverRegExp} = require('../scripts/utilities');
 
 const root = resolve(__dirname, '..');
 
-export const readmes = Object.freeze(['README.md', 'src/components/README.md']);
+const readmes = Object.freeze(['README.md', 'src/components/README.md']);
 
 console.log(`🆕 Updating version in ${readmes.join(', ')}...`);
 readmes
@@ -24,3 +24,5 @@ readmes
 console.log(`🏃‍♂️ Running \`git add -A ${readmes.join(' ')}\`...`);
 const execOpts = {stdio: 'inherit'};
 execSync(`git add -A ${readmes.join(' ')}`, execOpts);
+
+module.exports = readmes;

polaris-react/tests/readme-update-version.test.js

@@ -2,7 +2,7 @@ const path = require('path');
 const fs = require('fs');
 
 const {semverRegExp} = require('../scripts/utilities');
-const {readmes} = require('../scripts/readme-update-version');
+const readmes = require('../scripts/readme-update-version');
 
 describe('readme-update-version', () => {
   it('matches 4 semver numbers in READMEs', () => {