Update beta tester build step (#39732)

* Update beta tester build step

* Add changefile(s) from automation for the following project(s): woocommerce-beta-tester

---------

Co-authored-by: github-actions <github-actions@github.com>

plugins/woocommerce-beta-tester/changelog/update-beta-tester-build-step

@@ -0,0 +1,5 @@
+Significance: patch
+Type: dev
+Comment: This is a dev-related change to the build step for Woorelease, and no changelog entry is required.
+
+

plugins/woocommerce-beta-tester/package.json

@@ -50,6 +50,9 @@
 			"js": "assets/js/*.js"
 		}
 	},
+  "config": {
+    "build_step": "pnpm run build:zip"
+  },
 	"scripts": {
 		"postinstall": "composer install",
 		"changelog": "composer exec -- changelogger",