Fix copy of signed Powershell script into release packages (#305)

Author: zooba

windows-release/stage-layout-pymanager.yml

@@ -178,7 +178,7 @@ jobs:
 
   - ${{ if parameters.SigningCertificate }}:
     - powershell: |
-        copy "$(Pipeline.Workspace)\bin_$(Name)\Activate.ps1" Lib\venv\scripts\common\Activate.ps1 -Force
+        copy "$(Pipeline.Workspace)\bin_$(BinArtifact)\Activate.ps1" Lib\venv\scripts\common\Activate.ps1 -Force
       displayName: 'Copy signed files into sources'
       workingDirectory: $(Build.SourcesDirectory)\cpython