bench: minor string interpolation change in stats/incr/wmean

[Om-A-osc]

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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
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• task: lint_typescript_declarations
  status: passed
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Description

What is the purpose of this pull request?

This pull request:

• Refactors string construction to use @stdlib/string/format instead of manual string concatenation.
• Aligns the implementation with established stdlib coding practices.
• Improves readability and consistency of string interpolation.
• Applies changes discovered while working on @stdlib/stats/incr/wmean.

Related Issues

Does this pull request have any related issues?

No related issues.

Questions

Any questions for reviewers of this pull request?

No.

Other

Any other information relevant to this pull request? This may include screenshots, references, and/or implementation notes.

• This change does not resolve or introduce any tracked issues.
• The update is a small internal refactor and does not affect public APIs or behavior.
• Contributing guidelines were read and followed.

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?

• Yes
• No

Disclosure

No AI assistance was used in the implementation, tests, or documentation.

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@stdlib-js/reviewers

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
stats/incr/wmean	$\color{green}174/174$ $\color{green}+100.00%$	$\color{green}7/7$ $\color{green}+100.00%$	$\color{green}2/2$ $\color{green}+100.00%$	$\color{green}174/174$ $\color{green}+100.00%$

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