fix browser integration tests

Author: Lms24

packages/wasm/test/scripts/ensure-browser-bundle.js

@@ -4,7 +4,7 @@ const { execSync } = require('child_process');
 
 function ensureBrowserBundle() {
   const browserPackageDir = path.resolve(__dirname, '../../../browser');
-  if (!fs.existsSync(path.resolve(browserPackageDir, 'build/bundle.js'))) {
+  if (!fs.existsSync(path.resolve(browserPackageDir, 'build/bundle/bundle.js'))) {
     // eslint-disable-next-line no-console
     console.warn('\nWARNING: Missing browser bundle. Bundle will be created before running wasm integration tests.');
     execSync(`pushd ${browserPackageDir} && yarn build:bundle && popd`);