Update stale "30+" check count to 54 in README.md

[Copilot]

Two references in README.md still advertised the old "30+" check count instead of the current 54.

Changes

• Line 227 — Quick Scanner feature bullet: 30+ WordPress-specific checks → 54 WordPress-specific checks
• Line 539 — Tools comparison table: 30+ WordPress antipatterns → 54 WordPress antipatterns

Original prompt

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This section details on the original issue you should resolve

<issue_title>Stale test count</issue_title>
<issue_description>tools/wp-code-check/README.md text copy still has stale “30+ checks” wording and should be updated to 54 tests:

tools/wp-code-check/README.md:127
tools/wp-code-check/README.md:347</issue_description>

<agent_instructions>Important: Please pull from development branch and make the PR against/into development.</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes Stale test count #130

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