Update connector-marketo.md

Author: v-ccolin

articles/data-factory/connector-marketo.md

@@ -75,7 +75,7 @@ The following properties are supported for Marketo linked service:
 |:--- |:--- |:--- |
 | type | The type property must be set to: **Marketo** | Yes |
 | endpoint | The endpoint of the Marketo server. (i.e. 123-ABC-321.mktorest.com)  | Yes |
-| clientId | The client Id of your Marketo service.  | Yes |
+| clientId | The client ID of your Marketo service.  | Yes |
 | clientSecret | The client secret of your Marketo service. Mark this field as a SecureString to store it securely, or [reference a secret stored in Azure Key Vault](store-credentials-in-key-vault.md). | Yes |
 | useEncryptedEndpoints | Specifies whether the data source endpoints are encrypted using HTTPS. The default value is true.  | No |
 | useHostVerification | Specifies whether to require the host name in the server's certificate to match the host name of the server when connecting over TLS. The default value is true.  | No |