Update dependency @ember/test-helpers to v5.4.0 (#12177)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package.json

@@ -63,7 +63,7 @@
     "@ember/optional-features": "2.2.0",
     "@ember/render-modifiers": "3.0.0",
     "@ember/string": "4.0.1",
-    "@ember/test-helpers": "5.3.0",
+    "@ember/test-helpers": "5.4.0",
     "@ember/test-waiters": "4.1.1",
     "@embroider/compat": "3.9.1",
     "@embroider/core": "3.5.7",