chore(deps): update oven-sh/setup-bun action to v2 (#189)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [oven-sh/setup-bun](https://togithub.com/oven-sh/setup-bun) | action | major | `v1` -> `v2` |

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### Release Notes

<details>
<summary>oven-sh/setup-bun (oven-sh/setup-bun)</summary>

### [`v2`](https://togithub.com/oven-sh/setup-bun/releases/tag/v2)

[Compare Source](https://togithub.com/oven-sh/setup-bun/compare/v1...v2)

`oven-sh/setup-bun` is the github action for setting up Bun.

This release introduces support for the `bun-version-file` option, fixes [https://github.com/oven-sh/setup-bun/issues/79](https://togithub.com/oven-sh/setup-bun/issues/79), and adds bun paths & urls to the output ([https://github.com/oven-sh/setup-bun/issues/81](https://togithub.com/oven-sh/setup-bun/issues/81))

For more information, see [https://github.com/oven-sh/setup-bun/pull/76](https://togithub.com/oven-sh/setup-bun/pull/76) by [@&#8203;adeherysh](https://togithub.com/adeherysh) and [https://github.com/oven-sh/setup-bun/pull/80](https://togithub.com/oven-sh/setup-bun/pull/80) by [@&#8203;xHyroM](https://togithub.com/xHyroM) 🎉

**Full Changelog**: oven-sh/setup-bun@v1...v2

</details>

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### Configuration

📅 **Schedule**: Branch creation - "before 4am on Wednesday" in timezone Europe/Berlin, Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

♻ **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.

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

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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/mheob/config).

.github/workflows/check.yml

@@ -13,7 +13,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Setup BUN
-        uses: oven-sh/setup-bun@v1
+        uses: oven-sh/setup-bun@v2
 
       - name: Install Dependencies
         run: bun install --frozen-lockfile

.github/workflows/release.yml

@@ -27,7 +27,7 @@ jobs:
           token: ${{ secrets.MACHINE_USER_TOKEN }}
 
       - name: Setup BUN
-        uses: oven-sh/setup-bun@v1
+        uses: oven-sh/setup-bun@v2
 
       - name: Install Dependencies
         run: bun install --frozen-lockfile