chore(deps): update actions/setup-dotnet action to v4 (#579)

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

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/setup-dotnet](https://togithub.com/actions/setup-dotnet) |
action | major | `v3` -> `v4` |

---

### Release Notes

<details>
<summary>actions/setup-dotnet (actions/setup-dotnet)</summary>

### [`v4`](https://togithub.com/actions/setup-dotnet/compare/v3...v4)

[Compare
Source](https://togithub.com/actions/setup-dotnet/compare/v3...v4)

</details>

---

### Configuration

📅 **Schedule**: Branch creation - "before 4am" (UTC), 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.

---

- [ ] <!-- 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/ThorstenSauter/NoPlan).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNy44MS4zIiwidXBkYXRlZEluVmVyIjoiMzcuODEuMyIsInRhcmdldEJyYW5jaCI6Im1haW4ifQ==-->

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

.github/workflows/build.yml

@@ -26,7 +26,7 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
       - name: Setup .NET
-        uses: actions/setup-dotnet@v3
+        uses: actions/setup-dotnet@v4
         with:
           global-json-file: global.json
       - name: Restore dependencies

.github/workflows/codeql-analysis.yml

@@ -28,7 +28,7 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
       - name: Setup .NET
-        uses: actions/setup-dotnet@v3
+        uses: actions/setup-dotnet@v4
         with:
           global-json-file: global.json
       - name: Initialize CodeQL