Update create-dynamic-device-group-all-cloudpcs.md

Contains is a VERY costly operator for dynamic groups. It is recommended that either eq or startsWith is used instead.

windows-365/enterprise/create-dynamic-device-group-all-cloudpcs.md

@@ -51,7 +51,7 @@ In these steps, you’ll use the Device Model device property to create the dyna
 5. Select **Add dynamic query**.
 6. On the **Dynamic membership rules** page, enter the following:
     1. **Property** = "deviceModel"
-    2. **Operator** = "Contains"
+    2. **Operator** = "StartsWith"
     3. **Value** = "Cloud PC"
 7. To validate that it works, select **Validate Rules (Preview)** > **+Add devices** > select some Cloud PCs and non-Cloud PC devices.
 8. After the validation completes, select **Save** > **Create**.