Bump actions/setup-dotnet from 5 to 6

Bumps [actions/setup-dotnet](https://github.com/actions/setup-dotnet) from 5 to 6.
- [Release notes](https://github.com/actions/setup-dotnet/releases)
- [Commits](actions/setup-dotnet@v5...v6)

---
updated-dependencies:
- dependency-name: actions/setup-dotnet
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/build-and-test.yml

@@ -69,7 +69,7 @@ jobs:
                   restore-keys: ${{ runner.os }}-nuget-
 
             - name: DotNet Setup
-              uses: actions/setup-dotnet@v5
+              uses: actions/setup-dotnet@v6
               with:
                 dotnet-version: |
                   8.0.x