ArcBox - update repository URL for hello-arc application

[janegilring]

Note: For ease of issues and pull requests management and tracking, we kindly ask you to provide a meaningful and concise title to this feature request and answer all questions to the best of your ability.

Is your feature request related to a new Jumpstart scenario you would like to contribute?

Is your feature request related to a problem? Please describe.

Describe the solution you'd like.

Update repository URL for hello-arc application from https://github.com/microsoft/azure-arc-jumpstart-apps to https://github.com/Azure/jumpstart-apps

Describe alternatives you've considered.

Additional context.

[microsoft-github-policy-service]

Hi janegilring! Thank you for opening this issue. We appreciate your contribution and welcome you to our community! We are glad to have you here and to have your input on the Arc Jumpstart.