Update botframework-cli-daily.yml for Azure Pipelines

Author: munozemilio

build/botframework-cli-daily.yml

@@ -31,7 +31,7 @@ jobs:
       displayName: Set Build Version
 
     - powershell: |
-        date = (Get-Date).ToString("yyyyMMdd")
+        $date = (Get-Date).ToString("yyyyMMdd")
         echo "##vso[task.setvariable variable=buildDate]$date"  ## Store variable for subsequent steps
 
     - task: colinsalmcorner.colinsalmcorner-buildtasks.tag-build-task.tagBuildOrRelease@0