chore(deps): update pnpm to v9.15.4 (#1734)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [pnpm](https://pnpm.io)
([source](https://redirect.github.com/pnpm/pnpm/tree/HEAD/pnpm)) |
[`9.15.3` ->
`9.15.4`](https://renovatebot.com/diffs/npm/pnpm/9.15.3/9.15.4) |
[![age](https://developer.mend.io/api/mc/badges/age/npm/pnpm/9.15.4?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/pnpm/9.15.4?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/pnpm/9.15.3/9.15.4?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/pnpm/9.15.3/9.15.4?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>pnpm/pnpm (pnpm)</summary>

###
[`v9.15.4`](https://redirect.github.com/pnpm/pnpm/compare/v9.15.3...v9.15.4)

[Compare
Source](https://redirect.github.com/pnpm/pnpm/compare/v9.15.3...v9.15.4)

</details>

---

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package.json

@@ -31,7 +31,7 @@
     "vitepress": "1.5.0",
     "vitest": "^2.1.8"
   },
-  "packageManager": "pnpm@9.15.3",
+  "packageManager": "pnpm@9.15.4",
   "engines": {
     "node": ">=v20.8.0"
   },