chore(deps): update dependency ember-qunit to v5.1.5

Author: renovate[bot]

package.json

@@ -69,7 +69,7 @@
     "ember-maybe-import-regenerator": "0.1.6",
     "ember-md5": "1.2.0",
     "ember-page-title": "^6.2.2",
-    "ember-qunit": "5.1.4",
+    "ember-qunit": "5.1.5",
     "ember-resolver": "8.0.2",
     "ember-source": "3.28.0",
     "ember-source-channel-url": "3.0.0",