Update dotnetcore.yml

Author: 1manprojects

.github/workflows/dotnetcore.yml

@@ -14,7 +14,7 @@ jobs:
       with:
         dotnet-version: 3.1.100
     - name: Build
-      run: dotnet build -f netstandard2.1 --configuration Release
+      run: dotnet build -f netcoreapp3.1 --configuration Release
 
     - name: Test
-      run: dotnet test -f netstandard2.1 --configuration Release
+      run: dotnet test -f netcoreapp3.1 --configuration Release