Bump posthog-js from 1.255.3 to 1.306.1

Bumps [posthog-js](https://github.com/PostHog/posthog-js) from 1.255.3 to 1.306.1.
- [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/v1.255.3...posthog-js@1.306.1)

---
updated-dependencies:
- dependency-name: posthog-js
  dependency-version: 1.306.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package.json

@@ -31,7 +31,7 @@
     "lucide-react": "^0.561.0",
     "next": "15.3.8",
     "next-themes": "^0.4.6",
-    "posthog-js": "^1.255.3",
+    "posthog-js": "^1.306.1",
     "react": "^19.1.0",
     "react-dom": "^19.1.0",
     "react-hook-form": "^7.68.0",