Add valid values for cadence

doc/api/projects.md

@@ -1125,7 +1125,7 @@ POST /projects
 | `build_timeout`                                             | integer | **{dotted-circle}** No | The maximum amount of time, in seconds, that a job can run. |
 | `builds_access_level`                                       | string  | **{dotted-circle}** No | One of `disabled`, `private`, or `enabled`. |
 | `ci_config_path`                                            | string  | **{dotted-circle}** No | The path to CI configuration file. |
-| `container_expiration_policy_attributes`                    | hash    | **{dotted-circle}** No | Update the image cleanup policy for this project. Accepts: `cadence` (string), `keep_n` (integer), `older_than` (string), `name_regex` (string), `name_regex_delete` (string), `name_regex_keep` (string), `enabled` (boolean). |
+| `container_expiration_policy_attributes`                    | hash    | **{dotted-circle}** No | Update the image cleanup policy for this project. Accepts: `cadence` (string), `keep_n` (integer), `older_than` (string), `name_regex` (string), `name_regex_delete` (string), `name_regex_keep` (string), `enabled` (boolean). Valid values for `cadence` are: `1d` (every day), `7d` (every week), `14d` (every two weeks), `1month` (every month), or `3month` (every quarter). |
 | `container_registry_enabled`                                | boolean | **{dotted-circle}** No | Enable container registry for this project. |
 | `default_branch`                                            | string  | **{dotted-circle}** No | The [default branch](../user/project/repository/branches/default.md) name. |
 | `description`                                               | string  | **{dotted-circle}** No | Short project description. |

doc/user/packages/container_registry/index.md

@@ -636,6 +636,14 @@ Examples:
   curl --request PUT --header 'Content-Type: application/json;charset=UTF-8' --header "PRIVATE-TOKEN: <your_access_token>" --data-binary '{"container_expiration_policy_attributes":{"cadence":"1month","enabled":true,"keep_n":1,"older_than":"14d","name_regex":"","name_regex_delete":".*","name_regex_keep":".*-master"}}' "https://gitlab.example.com/api/v4/projects/2"
   ```
 
+Valid values for `cadence` when using the API are:
+
+- `1d` (every day)
+- `7d` (every week)
+- `14d` (every two weeks)
+- `1month` (every month)
+- `3month` (every quarter)
+
 See the API documentation for further details: [Edit project](../../../api/projects.md#edit-project).
 
 ### Use with external container registries