title: Not getting any values from variables in variable groups in Azure Devops pipeline
body: <p>I am really struggling with some variables which I have in my variable group named 'android-pipeline'.
  Inside this variable group, I have some variables with values.
  But when I am running the pipeline it cannot read the values inside my variable group. :(</p>
  <p>Example:
  Inside the variable group, I have a variable called
  $(key.alias)
  I am trying to get this value which is behind the variable, see my code below.</p>
  <p>I think something is wrong with the syntax (or the way I am using it), but I cannot find the right syntax for using my $(key.alias) variable.</p>
  <p>Also, inside the variable group I have made sure that All pipelines have access to this Variable group.
  Can someone, please tell me how I can get the value behind the $(key.alias) variable and use this in a task? I tried to follow many guides, but none are clear enough for me or not working</p>
  <pre><code>variables:
    group: android-pipeline
    buildConfiguration: 'Release'
  
  stages:
  stage: Publish
      dependsOn: Build
      displayName: Sign Apps 
      jobs:
  
          - task: AndroidSigning@3
            displayName: Android App signing
            inputs:
              apkFiles: '**/*.apk'
              apksignerKeystoreFile: '$(androidKeyStore)'
              apksignerKeystorePassword: '********'
              apksignerKeystoreAlias: '$(key.alias)'
              apksignerKeyPassword: '*******'
              apksignerArguments: --out $(outputDirectory)/app.release.apk
              zipalign: true
  
  </code></pre>