Update dependency @testing-library/jest-dom to v6.9.1

Author: dependencyupdates[bot]

src/Frontend/package-lock.json

@@ -51,7 +51,7 @@
     "@eslint/js": "9.38.0",
     "@pinia/testing": "1.0.2",
     "@testing-library/dom": "10.4.1",
-    "@testing-library/jest-dom": "6.8.0",
+    "@testing-library/jest-dom": "6.9.1",
     "@testing-library/user-event": "14.6.1",
     "@testing-library/vue": "8.1.0",
     "@tsconfig/node18": "18.2.4",