Work CI-CD

- Rework variable declaration to include sign group.

***NO_CI***

Author: josesimoes

azure-pipelines.yml

@@ -48,11 +48,17 @@ jobs:
     vmImage: 'windows-latest'
 
   variables:
-    DOTNET_NOLOGO: true
-    solution: 'nanoFramework.CoreLibrary.sln'
-    buildPlatform: 'Any CPU'
-    buildConfiguration: 'Release'
-    nugetPackageName: 'nanoFramework.CoreLibrary'
+    - group: sign-client-credentials
+    - name: DOTNET_NOLOGO
+      value: true  
+    - name: buildPlatform
+      value: 'Any CPU'  
+    - name: buildConfiguration
+      value: 'Release'
+    - name: solution
+      value: 'nanoFramework.CoreLibrary.sln'
+    - name: nugetPackageName
+      value: 'nanoFramework.CoreLibrary'
 
   steps: