chore: update randu to uniform for consistency

[hrshya]

Resolves none .

Description

What is the purpose of this pull request?

This pull request:

• Replaces randu() with uniform() from @stdlib/random/array/uniform for cleaner and more consistent code.

Related Issues

Does this pull request have any related issues?

This pull request:

• resolves no related issues.

Questions

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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.

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Coverage Report

Package	Statements	Branches	Functions	Lines
math/base/special/gamma	$\color{red}547/556$ $\color{green}+98.38\%$	$\color{red}48/52$ $\color{green}+92.31\%$	$\color{green}6/6$ $\color{green}+100.00\%$	$\color{red}547/556$ $\color{green}+98.38\%$

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