Azure DevOps Artifacts feed does not contain a package description

I am using an Azure DevOps to publish a nuget package in private Artifacts feed.The pipeline contains these last tasks:

 - task: DotNetCoreCLI@2    condition: eq(variables['Build.SourceBranchName'], 'main')    displayName: 'dotnet pack'    inputs:      command: pack      packagesToPack: '/home/vsts/work/1/s/src/xxx/xxxx.csproj'      arguments: '--configuration $(BuildConfiguration)'      versioningScheme: byEnvVar      versionEnvVar: PackageVersion  - task: DotNetCoreCLI@2    condition: eq(variables['Build.SourceBranchName'], 'main')    displayName: 'dotnet push'    inputs:      command: 'push'      packagesToPush: '$(Build.ArtifactStagingDirectory)/*.nupkg'      nuGetFeedType: 'internal'      publishVstsFeed: 'xxxxxxxxxxxxxxxxxxxxx'

in Artifacts I would like to specifiy a Package description in the created nuget. However it is always "default". I tried with AssemblyInfo.cs and .nuspec file but none helped.