Bump actions/setup-dotnet from 1 to 1.8.0

Bumps [actions/setup-dotnet](https://github.com/actions/setup-dotnet) from 1 to 1.8.0.
- [Release notes](https://github.com/actions/setup-dotnet/releases)
- [Commits](actions/setup-dotnet@v1...v1.8.0)

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

Author: dependabot[bot]

.github/workflows/build.yml

@@ -37,7 +37,7 @@ jobs:
       run: git fetch --tags
       shell: pwsh
     - name: 'Install .NET Core SDK'
-      uses: actions/setup-dotnet@v1
+      uses: actions/setup-dotnet@v1.8.0
     - name: 'Dotnet Tool Restore'
       run: dotnet tool restore
       shell: pwsh