chore(deps): update pnpm to v9.1.1 (#235)

[![Mend
Renovate](https://app.renovatebot.com/images/banner.svg)](https://renovatebot.com)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [pnpm](https://pnpm.io) ([source](https://togithub.com/pnpm/pnpm)) |
[`9.1.0` -> `9.1.1`](https://renovatebot.com/diffs/npm/pnpm/9.1.0/9.1.1)
|
[![age](https://developer.mend.io/api/mc/badges/age/npm/pnpm/9.1.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/pnpm/9.1.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/pnpm/9.1.0/9.1.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/pnpm/9.1.0/9.1.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

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

### [`v9.1.1`](https://togithub.com/pnpm/pnpm/compare/v9.1.0...v9.1.1)

[Compare Source](https://togithub.com/pnpm/pnpm/compare/v9.1.0...v9.1.1)

</details>

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined),
Automerge - At any time (no schedule defined).

🚦 **Automerge**: Enabled.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR has been generated by [Mend
Renovate](https://www.mend.io/free-developer-tools/renovate/). View
repository job log
[here](https://developer.mend.io/github/JoshuaKGoldberg/boston-ts-website).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNy4zNjMuNSIsInVwZGF0ZWRJblZlciI6IjM3LjM2My41IiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6WyJkZXBlbmRlbmNpZXMiXX0=-->

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

package.json

@@ -72,7 +72,7 @@
 		"vite-tsconfig-paths": "^4.3.1",
 		"yaml-eslint-parser": "^1.2.2"
 	},
-	"packageManager": "pnpm@9.1.0",
+	"packageManager": "pnpm@9.1.1",
 	"engines": {
 		"node": ">=18"
 	},