Add title and description to group-list API doc

[ArvindHarinder1]

Important

Required for API changes:

• [] Link to API.md file: ADD LINK HERE
• [] Link to PR for public-facing schema changes (schema-Prod-beta/v1.0.csdl): ADD LINK HERE

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Add other supporting information, such as a description of the PR changes:

ADD INFORMATION HERE

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[learn-build-service-prod]

Learn Build status updates of commit c0f77c3:

⚠️ Validation status: warnings

File	Status	Preview URL	Details
api-reference/v1.0/api/group-list.md	⚠️Warning		Details

api-reference/v1.0/api/group-list.md

• Line 1, Column 1: [Warning: title-missing - See documentation] Missing required attribute: 'title'. Add a title string to show in search engine results.
• Line 13, Column 1: [Warning: h1-not-first - See documentation] Markdown content is not allowed before H1 'List groups'.
• Line 1, Column 1: [Suggestion: ms-date-missing - See documentation] Missing required attribute: 'ms.date'.
• Line 1, Column 1: [Suggestion: description-missing - See documentation] Missing required attribute: 'description'.

For more details, please refer to the build report.

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