Lab 03 - Include Supported Regions

[sakkuru]

https://github.com/MicrosoftLearning/mslearn-ai-language/blob/main/Instructions/Exercises/03-language-understanding.md

Currently, Conversational Language Understanding authoring is only available in specific regions. Shouldn't we include a list of supported regions (e.g., East US, Australia East) in the resource creation steps? Alternatively, we could provide a link to the list of supported regions.(Link)
This would help users avoid accidentally creating resources in unsupported regions.