fix release workflow

Author: patricoos

.github/workflows/release.yml

@@ -21,20 +21,20 @@ jobs:
       run: dotnet restore
 
     - name: Build 
-      run: dotnet build --configuration $config --no-restore
+      run: dotnet build --configuration ${config} --no-restore
 
     - name: Test      
-      run: dotnet test PortaCapena.OdooJsonRpcClient.Tests/PortaCapena.OdooJsonRpcClient.Tests.csproj --configuration $config --no-restore --no-build
+      run: dotnet test PortaCapena.OdooJsonRpcClient.Tests/PortaCapena.OdooJsonRpcClient.Tests.csproj --configuration ${config} --no-restore --no-build
 
     - name: Create Nuget Package
-      run: dotnet pack --configuration $config /p:Version=${{github.event.release.tag_name}} /p:PackageReleaseNotes="See https://github.com/patricoos/PortaCapena.OdooJsonRpcClient/releases/tag/${{github.event.release.tag_name}}"     
+      run: dotnet pack --configuration ${config} /p:Version=${{github.event.release.tag_name}} /p:PackageReleaseNotes="See https://github.com/patricoos/PortaCapena.OdooJsonRpcClient/releases/tag/${{github.event.release.tag_name}}"     
       working-directory: ./PortaCapena.OdooJsonRpcClient
 
     - name: Archive Nuget Package
       uses: actions/upload-artifact@v1
       with:
         name:  PortaCapena.OdooJsonRpcClient.${{github.event.release.tag_name}}.nupkg
-        path: ./PortaCapena.OdooJsonRpcClient/bin/$config/PortaCapena.OdooJsonRpcClient.${{github.event.release.tag_name}}.nupkg
+        path: ./PortaCapena.OdooJsonRpcClient/bin/${config}/PortaCapena.OdooJsonRpcClient.${{github.event.release.tag_name}}.nupkg
 
     - name: Publish NuGet Package
       run: dotnet nuget push **/PortaCapena.OdooJsonRpcClient.${{github.event.release.tag_name}}.nupkg --api-key ${{secrets.NUGET_API_KEY}} --source https://api.nuget.org/v3/index.json --no-symbols true