Update AWARE-SETUP.md

[lukemurraynz]

This pull request includes several updates to the docs/AWARE-SETUP.md file to improve clarity and add troubleshooting information. The most important changes involve refining instructions for setting up the application and adding a new troubleshooting section.

Documentation Improvements:

• Simplified the instruction for noting the Application (client) ID in the Azure Portal. (docs/AWARE-SETUP.md)
• Clarified the steps for setting Admin consent display name and description by adding quotes around the values. (docs/AWARE-SETUP.md)
• Corrected a minor grammatical issue in the instructions for adding permissions to the web app frontend. (docs/AWARE-SETUP.md)

Troubleshooting Additions:

• Added a new troubleshooting section to help users resolve a specific HTTP Error 500.30 related to missing or incorrect Azure OpenAI API Key. (docs/AWARE-SETUP.md)