Add description attribute to Teams AI Policy cmdlet documentation

[Andy447]

Add description attribute to Teams AI Policy cmdlet documentation

[learn-build-service-prod]

Learn Build status updates of commit 72edb27:

✅ Validation status: passed

File	Status	Preview URL	Details
teams/teams-ps/teams/New-CsTeamsAIPolicy.md	✅Succeeded	View (teams-ps)
teams/teams-ps/teams/Set-CsTeamsAIPolicy.md	✅Succeeded	View (teams-ps)

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel

[learn-build-service-prod]

Learn Build status updates of commit 14b7062:

✅ Validation status: passed

File	Status	Preview URL	Details
teams/teams-ps/teams/New-CsTeamsAIPolicy.md	✅Succeeded	View (teams-ps)
teams/teams-ps/teams/Set-CsTeamsAIPolicy.md	✅Succeeded	View (teams-ps)

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel

[learn-build-service-prod]

Learn Build status updates of commit 58c0968:

✅ Validation status: passed

File	Status	Preview URL	Details
teams/teams-ps/teams/New-CsTeamsAIPolicy.md	✅Succeeded	View (teams-ps)
teams/teams-ps/teams/Set-CsTeamsAIPolicy.md	✅Succeeded	View (teams-ps)

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel