Update botframework-cli-daily.yml for Azure Pipelines

Author: munozemilio

build/botframework-cli-daily.yml

@@ -20,15 +20,15 @@ schedules:
 
 jobs:
   - job: CLI
+    variables:
+    buildDate: $(Get-Date -Format yyyyMMdd)
 
     steps:
     - bash: |
         short_hash=`git rev-parse --short=7 HEAD`  ## At least 7 digits, more if needed for uniqueness
         echo "Full git hash:  $(Build.SourceVersion)"
         echo "Short git hash: $short_hash"
         echo "##vso[task.setvariable variable=short_hash]$short_hash"  ## Store variable for subsequent steps
-        dateStr = (Get-Date).ToString('yyyy-MM-dd') 
-        echo "##vso[task.setvariable variable=buildDate]dateStr"
       workingDirectory: $(Build.SourcesDirectory)
       displayName: Set Build Version