chore(deps): update dependency @web/test-runner to v0.12.16

Author: renovate-bot

guides/test-runner/getting-started/package-lock.json

@@ -8,6 +8,6 @@
   },
   "devDependencies": {
     "@esm-bundle/chai": "4.3.3",
-    "@web/test-runner": "0.12.15"
+    "@web/test-runner": "0.12.16"
   }
 }

guides/test-runner/getting-started/package.json

@@ -8,7 +8,7 @@
   },
   "devDependencies": {
     "@esm-bundle/chai": "4.3.3",
-    "@web/test-runner": "0.12.15",
+    "@web/test-runner": "0.12.16",
     "@web/test-runner-playwright": "0.8.4"
   }
 }