Update dependency ember-qunit to v8.1.1 (#610)

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

Author: renovate[bot]

package.json

@@ -49,7 +49,7 @@
     "ember-cli-htmlbars": "6.3.0",
     "ember-load-initializers": "2.1.2",
     "ember-page-title": "7.0.0",
-    "ember-qunit": "8.1.0",
+    "ember-qunit": "8.1.1",
     "ember-resolver": "10.1.1",
     "ember-source": "5.12.0",
     "ember-template-lint": "6.0.0",