docs: improve doctests for complex number instances in blas/ext/base/zfill

[DivyanshuVortex]

blas/ext/base/zfill

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type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:

• task: lint_filenames status: passed
• task: lint_editorconfig status: passed
• task: lint_markdown status: passed
• task: lint_package_json status: na
• task: lint_repl_help status: passed
• task: lint_javascript_src status: passed
• task: lint_javascript_cli status: na
• task: lint_javascript_examples status: passed
• task: lint_javascript_tests status: na
• task: lint_javascript_benchmarks status: na
• task: lint_python status: na
• task: lint_r status: na
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• task: lint_c_examples status: na
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• task: lint_typescript_declarations status: passed
• task: lint_typescript_tests status: passed
• task: lint_license_headers status: passed

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Resolves a part of #8641

Description

This pull request updates documentation examples for the array/base/accessor-getter package to correctly use complex number instance notation.

Related Issues

None.

Questions

No.

Other

No.

Checklist

• Read, understood, and followed the contributing guidelines.

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

{{TODO: add disclosure if applicable}}

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@stdlib-js/reviewers

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
blas/ext/base/zfill	$\color{green}459/459$ $color{green}+100.00%$	$\color{green}25/25$ $color{green}+100.00%$	$\color{green}4/4$ $color{green}+100.00%$	$\color{green}459/459$ $color{green}+100.00%$

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

[kgryte]

Apart from the REPL help file, this PR is looking good.

[kgryte]

LGTM