docs: update example code in utils TypeScript declarations

[stdlib-bot]

This PR updates TypeScript declarations for the @stdlib/utils namespace.

Reviewer Checklist

• Check the scope of the changes (following Conventional Commits):
  • Are these new APIs? Then this is a feat.
  • Are these changes to existing APIs that could break compatibility? Then this is a feat! (i.e., a breaking change).
  • Are these only documentation changes to existing APIs? Then this is docs.
• Update the PR title to align with the change type (feat, feat!, or docs).
• Approve the PR once you are confident about the classification and changes made.

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
utils	$\color{red}43717/59589$ $\color{green}+73.36%$	$\color{red}731/771$ $\color{green}+94.81%$	$\color{red}22/495$ $\color{green}+4.44%$	$\color{red}43717/59589$ $\color{green}+73.36%$

The above coverage report was generated for the changes in this PR.

[stdlib-bot]

PR Commit Message

docs: update example code in `utils` TypeScript declarations

PR-URL: https://github.com/stdlib-js/stdlib/pull/9596

Reviewed-by: Philipp Burckhardt <[email protected]>
Signed-off-by: stdlib-bot <[email protected]>

Please review the above commit message and make any necessary adjustments.