docs: fix mismatched README sub-header in regexp/dirname

[Planeshifter]

Description

This pull request corrects a copy-paste typo in @stdlib/regexp/dirname/README.md. The sub-header at line 54 reads #### reBasename.REGEXP instead of #### reDirname.REGEXP. The code example immediately under it already uses reDirname.REGEXP, and the subsequent sub-headers (reDirname.REGEXP_POSIX, reDirname.REGEXP_WIN32) use the correct identifier, so this is the only line out of step.

regexp/dirname

Renamed the README sub-header from reBasename.REGEXP to reDirname.REGEXP. Conformance with the namespace-wide convention of using a package's own main identifier in its README sub-headers: 26 of 27 sibling packages (96%); dirname was the lone outlier. Documentation-only — no JSDoc, source, or tests touched.

Related Issues

This pull request has no related issues.

Questions

No.

Other

The change was produced by an automated cross-package drift audit over the 27 non-autogenerated members of @stdlib/regexp/*. The drift candidate was confirmed by three independent reviewer agents (semantic, cross-reference, structural). No other corrections survived filtering: remaining outliers in the namespace either reflect intentional architectural differences (e.g., reviver and to-json lack test/test.main.js because they have no platform dispatch) or were ruled out by the auto-populated-section gate (the empty ## See Also sections in five packages are package-generator output).

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

This PR was authored by Claude Code as part of an automated cross-package drift detection routine over @stdlib/regexp/*. Three independent reviewer agents (semantic, cross-reference, structural) confirmed the candidate before the fix was applied. A maintainer should promote out of draft after review.

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@stdlib-js/reviewers

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Generated by Claude Code

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
regexp/dirname	$\color{green}132/132$ $\color{green}+100.00\%$	$\color{green}9/9$ $\color{green}+100.00\%$	$\color{green}1/1$ $\color{green}+100.00\%$	$\color{green}132/132$ $\color{green}+100.00\%$

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