docs: fix descriptions

[0PrashantYadav0]

Description

What is the purpose of this pull request?

This pull request:

• fixes @returns annotations in stats/base/ndarray/{smaxabs,smaxabssorted,sminabs}/lib/main.js to describe the absolute value, matching their lib/native.js and the d* counterparts.
• restores the full algorithm description in stats/base/ndarray/smeanlipw/lib/native.js, matching lib/main.js.
• fixes a typo ("a Welford's algorithm") in stats/base/ndarray/dvariancewd/lib/native.js.
• uses an en dash in "Kahan–Babuška" throughout stats/base/ndarray/smeankbn, matching its lib/main.js and dmeankbn.

Related Issues

Does this pull request have any related issues?

None.

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?

• Yes
• No

If you answered "yes" above, how did you use AI assistance?

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

Disclosure

If you answered "yes" to using AI assistance, please provide a short disclosure indicating how you used AI assistance. This helps reviewers determine how much scrutiny to apply when reviewing your contribution. Example disclosures: "This PR was written primarily by Claude Code." or "I consulted ChatGPT to understand the codebase, but the proposed changes were fully authored manually by myself.".

I used Claude Code to scan stats/base/ndarray for documentation inconsistencies and to draft these fixes; I reviewed each change.

---

@stdlib-js/reviewers

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
stats/base/ndarray/dvariancewd	$\\color{green}204/204$ $\\color{green}+0.00\\%$	$\\color{green}7/7$ $\\color{green}+0.00\\%$	$\\color{green}2/2$ $\\color{green}+0.00\\%$	$\\color{green}204/204$ $\\color{green}+0.00\\%$
stats/base/ndarray/smaxabs	$\\color{green}176/176$ $\\color{green}+0.00\\%$	$\\color{green}7/7$ $\\color{green}+0.00\\%$	$\\color{green}2/2$ $\\color{green}+0.00\\%$	$\\color{green}176/176$ $\\color{green}+0.00\\%$
stats/base/ndarray/smaxabssorted	$\\color{green}176/176$ $\\color{green}+0.00\\%$	$\\color{green}7/7$ $\\color{green}+0.00\\%$	$\\color{green}2/2$ $\\color{green}+0.00\\%$	$\\color{green}176/176$ $\\color{green}+0.00\\%$
stats/base/ndarray/smeanlipw	$\\color{green}176/176$ $\\color{green}+0.00\\%$	$\\color{green}7/7$ $\\color{green}+0.00\\%$	$\\color{green}2/2$ $\\color{green}+0.00\\%$	$\\color{green}176/176$ $\\color{green}+0.00\\%$
stats/base/ndarray/sminabs	$\\color{green}176/176$ $\\color{green}+0.00\\%$	$\\color{green}7/7$ $\\color{green}+0.00\\%$	$\\color{green}2/2$ $\\color{green}+0.00\\%$	$\\color{green}176/176$ $\\color{green}+0.00\\%$

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

[kgryte]

Suggested change

	* Computes the arithmetic mean of a one-dimensional single-precision floating-point ndarray using an improved Kahan–Babuška algorithm.
	* Computes the arithmetic mean of a one-dimensional single-precision floating-point ndarray using an improved Kahan-Babuška algorithm.

[kgryte]

Wrong hyphen. We should be using just a normal hyphen, not a Unicode dash.