Order projects in alphabetical order

https://coveord.atlassian.net/browse/KIT-4911

Author: fbeaudoincoveo

vitest.config.js

@@ -3,10 +3,10 @@ import {defineConfig} from 'vitest/config';
 export default defineConfig({
   test: {
     projects: [
-      './packages/headless/vitest.config.js',
-      './packages/headless-react/vitest.config.js',
       './packages/atomic/vitest.config.js',
       './packages/shopify/vitest.config.js',
+      './packages/headless/vitest.config.js',
+      './packages/headless-react/vitest.config.js',
       './samples/headless/commerce-react/vitest.config.js',
       './samples/headless/search-react/vitest.config.js',
     ],