Update New-CsTeamsMessagingPolicy.md

update new messaging policy attribute

Author: deekshanya

teams/teams-ps/teams/New-CsTeamsMessagingPolicy.md

@@ -55,6 +55,7 @@ New-CsTeamsMessagingPolicy [[-Identity] <XdsIdentity>]
  [-InOrganizationChatControl <String>]
  [-ReadReceiptsEnabledType <String>]
  [-Tenant <Guid>]
+ [-UsersCanDeleteBotMessages <Boolean>]
  [<CommonParameters>]
  [-WhatIf]
  ```
@@ -715,6 +716,22 @@ Accept pipeline input: False
 Accept wildcard characters: False
 ```
 
+### -UsersCanDeleteBotMessages
+
+Determines whether a user is allowed to delete messages sent by bots. Set this to TRUE to allow. Set this to FALSE to prohibit.
+
+```yaml
+Type: Boolean
+Parameter Sets: (All)
+Aliases:
+
+Required: False
+Position: Named
+Default value: False
+Accept pipeline input: False
+Accept wildcard characters: False
+```
+
 ### -WhatIf
 Shows what would happen if the cmdlet runs.
 The cmdlet is not run.