Update dependency loadtest to v8.1.1

Author: renovate[bot]

package-lock.json

@@ -55,7 +55,7 @@
     "jest": "28.1.3",
     "jest-html-reporters": "3.1.7",
     "jest-puppeteer": "6.2.0",
-    "loadtest": "8.1.0",
+    "loadtest": "8.1.1",
     "merge": "2.1.1",
     "puppeteer": "14.1.2",
     "ts-jest": "28.0.8",