Claude review: drm/ci: disable mr-label-maker-test

[Claude Code Review Bot <claude-review@example.com>]

Patch Review

**Correctness:** The patch adds a job override block that matches the established pattern in the file:

```yaml
mr-label-maker-test:
   rules:
    - when: never
```

This is identical in structure to the surrounding disabled jobs (`deploy-docs` at line 381, `linkcheck-docs` at line 385, `test-docs` at line 393). The placement is alphabetically/logically correct — inserted between `linkcheck-docs` and `test-docs`.

**Indentation:** Uses the same 3-space indent for `rules:` and 4-space indent for `- when: never`, consistent with the rest of the file.

**No concerns:**
- The commit message adequately explains both the problem (job got enabled, blocks pipeline) and the rationale (MR labelling is not used for DRM CI).
- The `Link:` tag to the failing pipeline is helpful for reviewers to verify the issue.
- The `Signed-off-by` is present.
- The `base-commit` is specified, making it easy to apply.

**Reviewed-by worthy.** This is a clean, minimal fix following existing conventions.

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