update default model_access_mode (#1594)

Signed-off-by: Kalyan <kalyan.ben10@live.com>

docs/model_access_control.md

@@ -77,7 +77,7 @@ The following table lists the available request fields.
 |:------------------------|:----------|:----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
 | `name`                  | String    | The model group name. Required.                                                                                                                                                                                                                           |
 | `description`           | String    | The model group description. Optional.                                                                                                                                                                                                                    |
-| `model_access_mode`     | String    | The access mode for this model. Valid values are `public`, `private`, and `restricted`. When this parameter is set to `restricted`, user must specify either `backend_roles` or `add_all_backend_roles`, but not both. Optional. Default is `restricted`. |
+| `model_access_mode`     | String    | The access mode for this model. Valid values are `public`, `private`, and `restricted`. When this parameter is set to `restricted`, user must specify either `backend_roles` or `add_all_backend_roles`, but not both. Optional. Default is `private`. |
 | `backend_roles`         | Array     | A list of the model owner's backend roles to add to the model. Required only if the `model_access_mode` is `restricted`. Cannot be specified at the same time as `add_all_backend_roles`. Optional.                                                       |
 | `add_all_backend_roles` | Boolean   | If `true`, all backend roles of the model owner are added to the model group. Default is `false`. Cannot be specified at the same time as `backend_roles`. Admin users cannot set this parameter to `true`. Optional.                                     |