chore: 🤖 update @ember/test-helpers to 5.2.1 (#2797)

addons/rose/package.json

@@ -48,7 +48,7 @@
     "@babel/eslint-parser": "^7.25.1",
     "@babel/plugin-proposal-decorators": "^7.24.7",
     "@ember/optional-features": "^2.1.0",
-    "@ember/test-helpers": "^4.0.5",
+    "@ember/test-helpers": "^5.2.1",
     "@embroider/test-setup": "^4.0.0",
     "@glimmer/component": "^1.1.2",
     "@glimmer/tracking": "^1.1.2",