Add release/3.0 to list of triggers (#344)

* Add release/3.0 to list of triggers

Add release/3.0 to triggers #343

* Update comment

azure-pipelines.yml

@@ -9,9 +9,10 @@ variables:
   # clean the local repo on the build agents
   Build.Repository.Clean: true
 
-# only trigger ci builds for the master branch
+# only trigger ci builds for the master and release branches
 trigger:
 - master
+- release/3.0
 
 # To be added in the future when VSTS supports this feature
 # only trigger pull request builds for the master branch
@@ -26,4 +27,4 @@ jobs:
       # agent pool can't be read from a user-defined variable (Azure DevOps limitation)
       agentPool: dotnet-internal-temp-vs2019
       # runAsPublic is used in expressions, which can't read from user-defined variables
-      runAsPublic: false
\ No newline at end of file
+      runAsPublic: false