Merge branch 'docs-ci-var-example-fix' into 'master'

docs/ci/predefined_variables: fix variable name in example

See merge request gitlab-org/gitlab!45131

doc/ci/variables/predefined_variables.md

@@ -105,7 +105,7 @@ Kubernetes-specific environment variables are detailed in the
 | `CI_PROJECT_ID`                               | all    | all    | The unique ID of the current project that GitLab CI/CD uses internally                                                                                                                                                                                                                                                                                        |
 | `CI_PROJECT_NAME`                             | 8.10   | 0.5    | The name of the directory for the project that is currently being built. For example, if the project URL is `gitlab.example.com/group-name/project-1`, the `CI_PROJECT_NAME` would be `project-1`.                                                                                                                                                         |
 | `CI_PROJECT_NAMESPACE`                        | 8.10   | 0.5    | The project namespace (username or group name) that is currently being built                                                                                                                                                                                                                                                                                |
-| `CI_PROJECT_ROOT_NAMESPACE`                   | 13.2   | 0.5    | The **root** project namespace (username or group name) that is currently being built. For example, if `CI_PROJECT_NAME` is `root-group/child-group/grandchild-group`, `CI_PROJECT_ROOT_NAMESPACE` would be `root-group`.                                                                                                                                  |
+| `CI_PROJECT_ROOT_NAMESPACE`                   | 13.2   | 0.5    | The **root** project namespace (username or group name) that is currently being built. For example, if `CI_PROJECT_NAMESPACE` is `root-group/child-group/grandchild-group`, `CI_PROJECT_ROOT_NAMESPACE` would be `root-group`.                                                                                                                                  |
 | `CI_PROJECT_PATH`                             | 8.10   | 0.5    | The namespace with project name                                                                                                                                                                                                                                                                                                                            |
 | `CI_PROJECT_PATH_SLUG`                        | 9.3    | all    | `$CI_PROJECT_PATH` lowercased and with everything except `0-9` and `a-z` replaced with `-`. Use in URLs and domain names.                                                                                                                                                                                                                                  |
 | `CI_PROJECT_REPOSITORY_LANGUAGES`             | 12.3   | all    | Comma-separated, lowercased list of the languages used in the repository (e.g. `ruby,javascript,html,css`)                                                                                                                                                                                                                                                 |