Update publish-artefacts.yml

Publish artifacts when the Build.Reason is not a Pull Request.

Author: ramsessanchez

.azure-pipelines/templates/build/publish-artefacts.yml

@@ -16,5 +16,6 @@ steps:
     TargetFolder: '$(Build.ArtifactStagingDirectory)/'
 
 - publish: $(Build.ArtifactStagingDirectory)
+  condition: ne(variables['Build.Reason'], 'PullRequest')
   artifact: Drop
   displayName: Publish Build Artifact