chore: address commit comments for commit 8b01d81 (issue #10423)

[parthodas23]

Resolves #10423.

Description

Refactors the tabulate-by examples to use @stdlib/random/array/discrete-uniform and @stdlib/array/take instead of a manual for loop with randu and floor.

This pull request:

• Refactors the tabulate-by examples to use @stdlib/random/array/discrete-uniform and @stdlib/array/take for a more idiomatic approach.
• Updates the README.md to ensure documentation matches the new implementation.

Related Issues

Does this pull request have any related issues?

This pull request has the following related issues:

• Address commit comments (commit 8b01d81) #10423

Questions

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Other

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Verified changes by running:
make EXAMPLES_FILTER=".*/utils/tabulate-by/.*" examples

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• Read, understood, and followed the contributing guidelines.

AI Assistance

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• Yes
• No

Disclosure

None.

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