chore(deps): update dependency posthog-js to v1.257.1 (#608)

This PR contains the following updates:

| Package | Type | Update | Change | OpenSSF |
|---|---|---|---|---|
| [posthog-js](https://posthog.com/docs/libraries/js)
([source](https://redirect.github.com/PostHog/posthog-js)) |
dependencies | patch | [`1.257.0` ->
`1.257.1`](https://renovatebot.com/diffs/npm/posthog-js/1.257.0/1.257.1)
| [![OpenSSF
Scorecard](https://api.securityscorecards.dev/projects/github.com/PostHog/posthog-js/badge)](https://securityscorecards.dev/viewer/?uri=github.com/PostHog/posthog-js)
|

---

### Release Notes

<details>
<summary>PostHog/posthog-js (posthog-js)</summary>

###
[`v1.257.1`](https://redirect.github.com/PostHog/posthog-js/releases/tag/v1.257.1):
1.257.1

[Compare
Source](https://redirect.github.com/PostHog/posthog-js/compare/v1.257.0...v1.257.1)

#### 1.257.1 - 2025-07-21

- return capture results from captureException
([#&#8203;2081](https://redirect.github.com/PostHog/posthog-js/issues/2081))
- update posthog-js at workspace level
([#&#8203;2096](https://redirect.github.com/PostHog/posthog-js/issues/2096))
- chore(tests): use playwright for integration tests
([#&#8203;2093](https://redirect.github.com/PostHog/posthog-js/issues/2093))
- fix: Sync consent with persistence immediately
([#&#8203;2082](https://redirect.github.com/PostHog/posthog-js/issues/2082))
- Use posthog consent in next playground
([#&#8203;2083](https://redirect.github.com/PostHog/posthog-js/issues/2083))

</details>

---

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bun.lock

@@ -39,7 +39,7 @@
     "gray-matter": "4.0.3",
     "lucide-react": "0.525.0",
     "next": "15.4.2",
-    "posthog-js": "1.257.0",
+    "posthog-js": "1.257.1",
     "posthog-node": "5.6.0",
     "prettier": "3.6.2",
     "react": "19.1.0",