Bump actions/setup-dotnet from 4 to 5 (#118)

Bumps [actions/setup-dotnet](https://github.com/actions/setup-dotnet) from 4 to 5.
- [Release notes](https://github.com/actions/setup-dotnet/releases)
- [Commits](https://github.com/actions/setup-dotnet/compare/v4...v5)

---
updated-dependencies:
- dependency-name: actions/setup-dotnet
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/dotnet.yaml

@@ -21,7 +21,7 @@ jobs:
     - uses: actions/checkout@v5
       with:
         fetch-depth: 0 # so that NerdBank.GitVersioning has access to history
-    - uses: actions/setup-dotnet@v4
+    - uses: actions/setup-dotnet@v5
       with:
         dotnet-version: '8.0.x'
     - name: Restore dependencies