fix: correct doctest example for tree sync (closes #8310)

[sujalc879]

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type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes. report:

• task: lint_filenames status: passed
• task: lint_editorconfig status: passed
• task: lint_markdown status: na
• task: lint_package_json status: na
• task: lint_repl_help status: na
• task: lint_javascript_src status: passed
• task: lint_javascript_cli status: na
• task: lint_javascript_examples status: na
• task: lint_javascript_tests status: na
• task: lint_javascript_benchmarks status: na
• task: lint_python status: na
• task: lint_r status: na
• task: lint_c_src status: na
• task: lint_c_examples status: na
• task: lint_c_benchmarks status: na
• task: lint_c_tests_fixtures status: na
• task: lint_shell status: na
• task: lint_typescript_declarations status: passed
• task: lint_typescript_tests status: na
• task: lint_license_headers status: passed ---

Resolves #8310 .

Description

What is the purpose of this pull request?

This pull request:

• This pull request fixes JavaScript linting errors identified in the automated lint workflow, particularly in:

• lib/node_modules/@stdlib/_tools/pkgs/tree/lib/sync.js

• The changes ensure all JSDoc annotations are valid and that the code passes all linting checks.

Related Issues

Does this pull request have any related issues?

This pull request has the following related issues:

• Fix JavaScript lint errors #8310 (JavaScript linting errors)

Questions

Any questions for reviewers of this pull request?

No.

Other

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No.

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{{TODO: add disclosure if applicable}}

---

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[kgryte]

Ref: #8316

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Thank you for working on this pull request. However, we cannot accept your contribution as the issue this pull request seeks to resolve has already been addressed in a different pull request or commit.

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