Fix build version script

Author: SelahattinSert

azure-pipelines.yml

@@ -46,8 +46,9 @@ stages:
 
           - script: |
               echo "Setting BUILD_VERSION..."
-              echo "##vso[task.setvariable variable=BUILD_VERSION]$(date +'%Y%m%d')-$(Build.SourceVersionShort)"
-              echo "::add-mask::$(date +'%Y%m%d')-$(Build.SourceVersionShort)"
+              BUILD_VERSION=$(date +'%Y%m%d')-$(Build.SourceVersionShort)
+              echo "##vso[task.setvariable variable=BUILD_VERSION]$BUILD_VERSION"
+              echo "::add-mask::$BUILD_VERSION"
             displayName: "Set Secret Build Version"
 
           - task: Docker@2