CI pipeline fix attempt

Author: manuelbl

.github/workflows/demos.yaml

@@ -34,14 +34,15 @@ jobs:
 
       - name: Build library package
         run: |
+          dotnet restore
           dotnet tool restore
-          dotnet pack --no-build --verbosity normal
+          dotnet pack --verbosity normal
 
       - name: Install library package
         run: |
           $pkg = Resolve-Path QrCodeGenerator\bin\Release\Net.Codecrete.QrCodeGenerator.*.nupkg
           nuget push $pkg -Source Local
-          
+
       - name: Build Demo-ImageSharp
         run: dotnet build
         working-directory: Demo-ImageSharp