Update tutorial-containerize-simple-web-app-for-app-service.md

[laujan]

resolves: Azure/azure-sdk-for-python#37076

[prmerger-automator]

@laujan : Thanks for your contribution! The author(s) have been notified to review your proposed change.

[laujan]

cc: @YalinLi0312 @kristapratico

[learn-build-service-prod]

Learn Build status updates of commit b816c94:

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[bobtabor-msft]

@laujan Hi, first did you test this change in bash? I'm pretty sure this is a PowerShell Command?

Also, asking kindly, please do not merge your changes without giving content owners time to review your changes. It usually requires more than 3 hours to focus my attention away from what I'm working on to new PRs.

Please do not update this document because it is currently being rewritten and that will create extra work to resolve a merge conflict.