Add Description params to Teams AI policy Set and New docs

Author: Andy Wang

teams/teams-ps/teams/New-CsTeamsAIPolicy.md

@@ -98,6 +98,22 @@ Accept pipeline input: False
 Accept wildcard characters: False
 ```
 
+### -Description
+Enables administrators to provide explanatory text about the Teams AI policy.
+For example, the Description might indicate the users the policy should be assigned to.
+
+```yaml
+Type: String
+Parameter Sets: (All)
+Aliases:
+
+Required: False
+Position: Named
+Default value: None
+Accept pipeline input: False
+Accept wildcard characters: False
+```
+
 ### CommonParameters
 This cmdlet supports the common parameters: -Debug, -ErrorAction, -ErrorVariable, -InformationAction, -InformationVariable, -OutVariable, -OutBuffer, -PipelineVariable, -Verbose, -WarningAction, and -WarningVariable. For more information, see [about_CommonParameters](https://go.microsoft.com/fwlink/?LinkID=113216).
 

teams/teams-ps/teams/Set-CsTeamsAIPolicy.md

@@ -156,6 +156,22 @@ Accept pipeline input: False
 Accept wildcard characters: False
 ```
 
+### -Description
+Enables administrators to provide explanatory text about the Teams AI policy.
+For example, the Description might indicate the users the policy should be assigned to.
+
+```yaml
+Type: String
+Parameter Sets: (All)
+Aliases:
+
+Required: False
+Position: Named
+Default value: None
+Accept pipeline input: False
+Accept wildcard characters: False
+```
+
 ### CommonParameters
 This cmdlet supports the common parameters: -Debug, -ErrorAction, -ErrorVariable, -InformationAction, -InformationVariable, -OutVariable, -OutBuffer, -PipelineVariable, -Verbose, -WarningAction, and -WarningVariable. For more information, see [about_CommonParameters](https://go.microsoft.com/fwlink/?LinkID=113216).