Expand change notifications for Teams resource limits

[dylanstetts]

Added important note about Teams subscription limits and their impact on resource quotas, which was previously unclear.

Important

Required for API changes:

• [] Link to API.md file: https://learn.microsoft.com/en-us/graph/api/resources/change-notifications-api-overview?view=graph-rest-1.0

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

This change clarifies the true tenant limitations for Teams resource subscriptions. This is in response to a customer escalation, incident 21000000814057

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[learn-build-service-prod]

Learn Build status updates of commit bfd1be7:

✅ Validation status: passed

File	Status	Preview URL	Details
concepts/includes/change-notifications-supported-resources-expanded.md	✅Succeeded

For more details, please refer to the build report.

[learn-build-service-prod]

Learn Build status updates of commit e52a597:

✅ Validation status: passed

File	Status	Preview URL	Details
concepts/includes/change-notifications-supported-resources-expanded.md	✅Succeeded

For more details, please refer to the build report.