Update azure-pipelines-rgbnet.yml for Azure Pipelines

[skip ci]

ci/azure-pipelines-rgbnet.yml

@@ -3,6 +3,8 @@
 # Add steps that publish symbols, save build artifacts, and more:
 # https://docs.microsoft.com/azure/devops/pipelines/apps/windows/dot-net
 
+trigger: none
+
 resources:
   repositories:
   - repository: RGBdotNET