Fix build yml

Author: amoerie

.github/workflows/build.yml

@@ -13,13 +13,9 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
-    - name: Setup .NET Core
-      uses: actions/setup-dotnet@v1
-      with:
-        dotnet-version: 3.1.301
-    - name: Install dependencies
+    - name: Restore
       run: dotnet restore
     - name: Build
       run: dotnet build --configuration Release --no-restore
     - name: Test
-      run: dotnet test --no-restore --verbosity normal
+      run: dotnet test --configuration Release --no-restore --verbosity normal