Update concepts-symmetric-key-attestation.md

Fixing deprecated Azure CLI command

Author: LeelaRajesh-Sayana

articles/iot-dps/concepts-symmetric-key-attestation.md

@@ -76,7 +76,7 @@ Replace the value of `--key` argument with the **Primary Key** from your enrollm
 Replace the value of `--registration-id` argument with your registration ID.
 
 ```azurecli
-az iot dps compute-device-key --key 8isrFI1sGsIlvvFSSFRiMfCNzv21fjbE/+ah/lSh3lF8e2YG1Te7w1KpZhJFFXJrqYKi9yegxkqIChbqOS9Egw== --registration-id sn-007-888-abc-mac-a1-b2-c3-d4-e5-f6
+az iot dps enrollment-group compute-device-key --key 8isrFI1sGsIlvvFSSFRiMfCNzv21fjbE/+ah/lSh3lF8e2YG1Te7w1KpZhJFFXJrqYKi9yegxkqIChbqOS9Egw== --registration-id sn-007-888-abc-mac-a1-b2-c3-d4-e5-f6
 ```
 
 Example result: