bench: add missing method name in benchmark description

[mvanhorn]

Summary

Adds missing :of: method name to the benchmark format string in @stdlib/array/little-endian-factory/benchmark/benchmark.of.js.

Changes

Line 55: '%s:len=5' -> '%s:of:len=5'

The first benchmark in the file correctly uses '%s:of' (line 36), but the second benchmark was missing the method name segment.

Closes #11151

This contribution was developed with AI assistance (Claude Code).

---

• Read, understood, and followed the contributing guidelines

[stdlib-bot]

Hello! Thank you for your contribution to stdlib.

We noticed that the contributing guidelines acknowledgment is missing from your pull request. Here's what you need to do:

1. Please read our contributing guidelines.

2. Update your pull request description to include this checked box:

   - [x] Read, understood, and followed the [contributing guidelines](https://github.com/stdlib-js/stdlib/blob/develop/CONTRIBUTING.md)

This acknowledgment confirms that you've read the guidelines, which include:

• The developer's certificate of origin
• Your agreement to license your contributions under the project's terms

We can't review or accept contributions without this acknowledgment.

Thank you for your understanding and cooperation. We look forward to reviewing your contribution!

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
array/little-endian-factory	$\color{red}334/566$ $\color{green}+59.01%$	$\color{green}4/4$ $\color{green}+100.00%$	$\color{red}0/4$ $\color{green}+0.00%$	$\color{red}334/566$ $\color{green}+59.01%$

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

[batpigandme]

Hi,

Just like in your other PR, we need the snippet suggested by the stdlib-bot to be added to the PR description

-   [x] Read, understood, and followed the [contributing guidelines](https://github.com/stdlib-js/stdlib/blob/develop/CONTRIBUTING.md)

Thanks!

[mvanhorn]

Added to the description. Thanks for the heads up.