Update dependency karma to v6 [SECURITY]

Update karma from 5.2.3 to 6.4.4

Change-type: patch

Author: balena-renovate[bot]

package.json

@@ -50,7 +50,7 @@
     "buffer": "^5.7.1",
     "chai": "^4.3.4",
     "chai-as-promised": "^7.1.1",
-    "karma": "^5.0.9",
+    "karma": "^6.0.0",
     "lodash": "^4.17.21",
     "mocha": "^10.0.0",
     "mockttp": "^3.8.0",