When using yaml aliases, CircleCI executor docker images not updated

[yanns]

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A Mend.io-hosted app

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No response

Please tell us more about your question or problem

Minimal reproduction: https://github.com/yanns/circleci-executors

When using yaml aliases, the docker images used for CircleCI executors are not updated anymore.

aliases:
  - &working_directory ~/circleci-executors

executors:
  rust-docker:
    docker:
      - image: cimg/rust:1.82.0
    working_directory: *working_directory

Logs (if relevant)

EBUG: Error extracting circleci images
{
  "err": {
    "message": "Schema error",
    "stack": "ZodError: Schema error\n    at Object.get error [as error] (/usr/local/renovate/node_modules/.pnpm/zod@3.24.1/node_modules/zod/lib/types.js:55:31)\n    at ZodObject.parse (/usr/local/renovate/node_modules/.pnpm/zod@3.24.1/node_modules/zod/lib/types.js:131:22)\n    at parseSingleYaml (/usr/local/renovate/lib/util/yaml.ts:136:17)\n    at Object.extractPackageFile (/usr/local/renovate/lib/modules/manager/circleci/extract.ts:61:35)\n    at extractPackageFile (/usr/local/renovate/lib/modules/manager/index.ts:75:9)\n    at getManagerPackageFiles (/usr/local/renovate/lib/workers/repository/extract/manager-files.ts:58:43)\n    at /usr/local/renovate/lib/workers/repository/extract/index.ts:57:28\n    at async Promise.all (index 0)\n    at extractAllDependencies (/usr/local/renovate/lib/workers/repository/extract/index.ts:54:26)\n    at extract (/usr/local/renovate/lib/workers/repository/process/extract-update.ts:160:28)\n    at extractDependencies (/usr/local/renovate/lib/workers/repository/process/index.ts:158:26)\n    at Object.renovateRepository (/usr/local/renovate/lib/workers/repository/index.ts:71:9)\n    at attributes.repository (/usr/local/renovate/lib/workers/global/index.ts:206:11)\n    at start (/usr/local/renovate/lib/workers/global/index.ts:191:7)\n    at /usr/local/renovate/lib/renovate.ts:19:22",
    "issues": {
      "aliases": {
        "0": "Expected object, received string"
      }
    }
  }
  "packageFile": ".circleci/config.yml"
}

[github-actions[bot]]

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[yanns]

I've added a minimal reproduction and could narrow down the issue

[rarkins]

Converted to issue: #34221