chore(deps): update dependency posthog-node to v5.5.1 (#597)

This PR contains the following updates:

| Package | Type | Update | Change | OpenSSF |
|---|---|---|---|---|
| [posthog-node](https://redirect.github.com/PostHog/posthog-js-lite)
([source](https://redirect.github.com/PostHog/posthog-js-lite/tree/HEAD/posthog-node))
| dependencies | patch | [`5.5.0` ->
`5.5.1`](https://renovatebot.com/diffs/npm/posthog-node/5.5.0/5.5.1) |
[![OpenSSF
Scorecard](https://api.securityscorecards.dev/projects/github.com/PostHog/posthog-js-lite/badge)](https://securityscorecards.dev/viewer/?uri=github.com/PostHog/posthog-js-lite)
|

---

### Release Notes

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

###
[`v5.5.1`](https://redirect.github.com/PostHog/posthog-js-lite/blob/HEAD/posthog-node/CHANGELOG.md#551--2025-07-15)

[Compare
Source](https://redirect.github.com/PostHog/posthog-js-lite/compare/posthog-node-v5.5.0...posthog-node-v5.5.1)

1. wrap `InconclusiveMatchError`s in `logMsgIfDebug` for local flag
evaluations on `sendFeatureFlags`

</details>

---

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## Summary by Sourcery

Update posthog-node dependency from v5.5.0 to v5.5.1

Enhancements:
- Wrap InconclusiveMatchError in logMsgIfDebug during local feature flag
evaluations on sendFeatureFlags

Chores:
- Bump posthog-node package version to 5.5.1

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

bun.lock

@@ -40,7 +40,7 @@
     "lucide-react": "0.525.0",
     "next": "15.4.1",
     "posthog-js": "1.257.0",
-    "posthog-node": "5.5.0",
+    "posthog-node": "5.5.1",
     "prettier": "3.6.2",
     "react": "19.1.0",
     "react-dom": "19.1.0",