chore: fix JavaScript lint errors (issue #8310)

[Prachi9506]

Resolves #8310

Description

What is the purpose of this pull request?

This pull request:

• Fixes a linting error in lib/node_modules/@stdlib/_tools/pkgs/tree/lib/sync.js.
  The issue was caused by a variable name conflict in the JSDoc example (tree shadowed the imported module).
  Renamed the example variable to out to resolve the conflict and pass linting.

Related Issues

Does this pull request have any related issues?

This pull request has the following related issues:

• Fix JavaScript lint errors #8310

Questions

Any questions for reviewers of this pull request?

No.

Other

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No.

Checklist

Please ensure the following tasks are completed before submitting this pull request.

• Read, understood, and followed the contributing guidelines.

AI Assistance

When authoring the changes proposed in this PR, did you use any kind of AI assistance?

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• No

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• Code generation (e.g., when writing an implementation or fixing a bug)
• Test/benchmark generation
• Documentation (including examples)
• Research and understanding

Disclosure

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{{TODO: add disclosure if applicable}}

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