docs: Point pr-review fixer at migrated github-pr-review skill

[rubambiza]

Summary

Points the pr-review fixer at the migrated github-pr-review skill in rossoctl/agent-skills, replacing the former github:pr-review skill that lived in rossoctl/rossoctl/.claude/skills/. This is unit 2 of the skill-migration epic rossoctl/rossoctl#2149; the skill landed in agent-skills via rossoctl/agent-skills#28.

Updates standing-orders/pr-review.md:

• Scope + Cron jobs now reference github-pr-review sourced from the agent-skills checkout.
• Adds a Skill Source subsection documenting the on-host checkout path, that the wiring lives in the fixer cron payload (updated via openclaw cron edit, never by hand-editing jobs.json), and the checkout-currency requirement.

The live fixer cron payload is repointed separately on the runner (operational step). The former skill is intentionally left in place in rossoctl/rossoctl until post-rewire monitoring confirms no review degradation (see #2149), keeping a one-step rollback.

Fixes #26

Assisted-By: Claude Code

[clawgenti]

Docs-only update that replaces two references to the old github:pr-review skill name with github-pr-review and adds a concise Skill Source subsection documenting the on-host agent-skills checkout path, cron payload wiring, and openclaw cron edit usage — all accurate and consistent with the migrated skill.

All checks pass. Ready for human review.

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Reviewed by clawgenti using github:pr-review

[cwiklik]

Clean docs pointer for the skill migration (epic #2149, unit 2). I verified the cross-repo references:

• skills/github-pr-review/SKILL.md exists in rossoctl/agent-skills — the documented path agent-skills/skills/github-pr-review/SKILL.md is correct.
• agent-skills#28 ("Migrate github-pr-review skill from rossoctl/rossoctl") is merged.
• The former github:pr-review skill is still present in rossoctl/rossoctl/.claude/skills/, matching the doc's "intentionally left in place until post-rewire monitoring" note.

The "Skill Source" subsection is a good addition — documenting that wiring lives in the fixer cron payload (openclaw cron edit, never hand-editing jobs.json) and the checkout-currency requirement. Correctly scoped: the live cron repoint is called out as a separate operational step, so the doc describes the target state without implying the runner is already switched.

Docs-only, DCO green, signed. LGTM.

Assisted-By: Claude Code