chore(deps): update dependency posthog-js to v1.266.3 (#744)

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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 | [`1.266.2` ->
`1.266.3`](https://renovatebot.com/diffs/npm/posthog-js/1.266.2/1.266.3)
| [![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>

###
[`v1.266.3`](https://redirect.github.com/PostHog/posthog-js/releases/tag/posthog-js%401.266.3)

[Compare
Source](https://redirect.github.com/PostHog/posthog-js/compare/posthog-js@1.266.2...posthog-js@1.266.3)

#### 1.266.3

##### Patch Changes

-
[#&#8203;2344](https://redirect.github.com/PostHog/posthog-js/pull/2344)
[`3d3fc37`](https://redirect.github.com/PostHog/posthog-js/commit/3d3fc37bfe351d9a464e652d8ec347192596769d)
Thanks
[@&#8203;lucasheriques](https://redirect.github.com/lucasheriques)! -
chore: mark renderSurvey as deprecated

</details>

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bun.lock

@@ -39,7 +39,7 @@
     "gray-matter": "4.0.3",
     "lucide-react": "0.544.0",
     "next": "15.5.3",
-    "posthog-js": "1.266.2",
+    "posthog-js": "1.266.3",
     "posthog-node": "5.8.5",
     "prettier": "3.6.2",
     "react": "19.1.1",