fix: upgrade posthog-js from 1.32.4 to 1.34.0

Snyk has created this PR to upgrade posthog-js from 1.32.4 to 1.34.0.

See this package in npm:
https://www.npmjs.com/package/posthog-js

See this project in Snyk:
https://app.snyk.io/org/maidul98/project/53d4ecb6-6cc1-4918-aa73-bf9cae4ffd13?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot

frontend/package-lock.json

@@ -33,7 +33,7 @@
 		"jsrp": "^0.2.4",
 		"markdown-it": "^13.0.1",
 		"next": "^12.2.5",
-		"posthog-js": "^1.30.0",
+		"posthog-js": "^1.34.0",
 		"query-string": "^7.1.1",
 		"react": "^17.0.2",
 		"react-beautiful-dnd": "^13.1.1",