fix(utils/some-by-right): refactor example to use array PRNG (issue #8227)

[Udit19199]

Description

What is the purpose of this pull request?

Updates the example for someByRight to use @stdlib/random/array/randu for creating the example array.

This change addresses a no-new-array linting error and improves the example's conciseness by replacing a for loop with a direct function call, as recommended by project maintainers.

The refactoring has been applied to both the runnable example (examples/index.js) and the example included in the package README.md. A no-redeclare directive has been added to the README.md to resolve a linter error caused by multiple example blocks declaring the same variable name.

Related Issues

Does this pull request have any related issues?

This pull request:

• resolves chore: fix JavaScript lint errors (issue #8227) #8228

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][contributing].

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Coverage Report

Package	Statements	Branches	Functions	Lines
utils/some-by-right	$\color{green}135/135$ $\color{green}+100.00\%$	$\color{green}15/15$ $\color{green}+100.00\%$	$\color{green}1/1$ $\color{green}+100.00\%$	$\color{green}135/135$ $\color{green}+100.00\%$

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