chore(deps): bump posthog-js (#447)

Bumps the production-deps group with 1 update in the / directory: [posthog-js](https://github.com/PostHog/posthog-js).


Updates `posthog-js` from 1.396.7 to 1.396.8
- [Release notes](https://github.com/PostHog/posthog-js/releases)
- [Changelog](https://github.com/PostHog/posthog-js/blob/main/CHANGELOG.md)
- [Commits](https://github.com/PostHog/posthog-js/compare/posthog-js@1.396.7...posthog-js@1.396.8)

---
updated-dependencies:
- dependency-name: posthog-js
  dependency-version: 1.396.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: production-deps
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

apps/web/package.json

@@ -25,7 +25,7 @@
     "konva": "^10",
     "lucide-react": "^0.577.0",
     "pdfjs-dist": "^6.1.200",
-    "posthog-js": "^1.396.6",
+    "posthog-js": "^1.396.8",
     "qr-code-styling": "^1.9.2",
     "react": "^19.2.7",
     "react-colorful": "^5",