Update embroider monorepo to v4

Author: renovate[bot]

package.json

@@ -63,8 +63,8 @@
     "@ember/string": "4.0.1",
     "@ember/test-helpers": "5.2.1",
     "@ember/test-waiters": "4.1.0",
-    "@embroider/compat": "3.9.0",
-    "@embroider/core": "3.5.6",
+    "@embroider/compat": "4.0.2",
+    "@embroider/core": "4.0.2",
     "@embroider/webpack": "4.1.0",
     "@eslint/eslintrc": "3.3.1",
     "@eslint/js": "9.26.0",