Update articles/data-factory/connector-azure-database-for-postgresql.md

Co-authored-by: Kazim Mir <[email protected]>

Author: MitchellGale

articles/data-factory/connector-azure-database-for-postgresql.md

@@ -165,7 +165,7 @@ The following properties are supported for the Azure Database for PostgreSQL lin
 | tenant | The tenant which the Azure Database for PostgreSQL server is located |Yes |
 | servicePrincipalId | Application ID of service principal |Yes |
 | service principal credential type | Select if service principal certificate or service principal key is desired authentication method<br/>- **ServicePrincipalCert**: Set to service principal certificate for service principal certifiate.<br/>- **ServicePrincipalKey**: Set to service principal key for service principal key authentication. | Yes |
-| service principal key | Client secret value. Used when service principal key is selected |Yes |
+| servicePrincipalKey | Client secret value. Used when service principal key is selected | Yes |
 | azureCloudType | Select the azure cloud type of your Azure Database for PostgreSQL server | Yes |
 | servicePrincipalEmbeddedCert | Service principal certificate file | Yes |
 | servicePrincipalEmbeddedCertPassword | Service principal certificate password if required | No |