chore(deps): update dependency ember-cli to v6

Author: renovate[bot]

packages/test-app/package.json

@@ -43,7 +43,7 @@
     "broccoli-asset-rev": "3.0.0",
     "concurrently": "9.2.0",
     "ember-auto-import": "2.10.0",
-    "ember-cli": "5.12.0",
+    "ember-cli": "6.5.0",
     "ember-cli-app-version": "7.0.0",
     "ember-cli-babel": "8.2.0",
     "ember-cli-clean-css": "3.0.0",