Update dependency qunit to v2.21.1 (#9125)

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

Author: renovate[bot]

package.json

@@ -134,7 +134,7 @@
     "nyc": "17.0.0",
     "postcss-preset-env": "9.6.0",
     "prettier": "3.3.3",
-    "qunit": "2.21.0",
+    "qunit": "2.21.1",
     "qunit-console-grouper": "0.3.0",
     "qunit-dom": "3.2.0",
     "tracked-built-ins": "3.3.0",