Fix the CI

Author: GillesTourreau

.github/workflows/github-actions-ci.yaml

@@ -23,6 +23,9 @@ jobs:
 
       - name: Build
         run: msbuild "PosInformatique.UnitTests.Databases.sln" /p:Configuration=Debug
+        
+      - name: Restore NuGet packages
+        run: nuget restore "samples/PosInformatique.UnitTests.Databases.Samples.sln"
 
       - name: Build the samples
         run: msbuild "samples/PosInformatique.UnitTests.Databases.Samples.sln" /p:Configuration=Debug