fix: regenerate rules/index.json with @commits trigger

[bborbe]

Regenerate rules/index.json via make build-index. The committed index was missing the trigger: ["@commits"] entry for git-workflow/never-direct-commit-to-master (the **Trigger**: @commits line is in docs since 7a8c11d), so make precommit -> check-index failed on every push. make check-index now passes.

[ben-s-pull-request-reviewer]

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PR Review Report

No changes to review — the diff is clean and correct.

Verdict: approve

This PR adds the missing trigger: ["@commits"] field to git-workflow/never-direct-commit-to-master in rules/index.json, which is exactly the right fix. The CHANGELOG entry uses conventional commit format. The JSON is valid. No issues found.

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{
"verdict": "approve",
"summary": "Clean bugfix: adds the missing @commits trigger to git-workflow/never-direct-commit-to-master so make precommit (check-index) no longer fails. CHANGELOG entry follows conventions. No issues found.",
"comments": [],
"concerns_addressed": []
}