Update APM managed skills

[github-actions]

Summary

• Update APM-managed skill dependencies pinned in apm.yml.
• Regenerate apm.lock.yaml and deployed .agents/skills/ content.
• Preserve full commit SHA pins so the generated diff is reviewable before merge.

APM dependency update

The following SHA-pinned GitHub APM dependencies were updated to their upstream default branch HEAD.

Package	Current	Latest	Compare
GoogleChrome/modern-web-guidance/skills/modern-web-guidance	22ab18df	84ae7251	GoogleChrome/modern-web-guidance@22ab18d...84ae725
github/awesome-copilot/skills/lsp-setup	6c4d33b9	143a3d97	github/awesome-copilot@6c4d33b...143a3d9

Related Issues

N/A - no issue to close

Scope

• App UI / workflow
• Core services / data model
• Copilot SDK / agent behavior
• Preview / WebView2
• Documentation / release readiness
• Tests / tooling
• Other: APM-managed agent skill content

Validation

• dotnet build RepoSyncRadar.sln -warnaserror - N/A - APM skill content only
• dotnet test RepoSyncRadar.sln -- --filter-not-trait Category=Manual - N/A - APM skill content only
• Focused tests: apm install --frozen; apm audit --ci --no-fail-fast; apm install; apm audit --ci --no-fail-fast
• Manual smoke / screenshots, if UI or WebView behavior changed; otherwise replace with N/A - no UI/WebView changes: N/A - no UI/WebView changes

Risk And Rollback

• User impact: Updates the guidance used by coding agents, not runtime application behavior.
• Operational risk: Medium. Skill text can change agent behavior; review apm.lock.yaml and the generated .agents/skills/ diff before merging.
• Rollback plan: Revert this PR to restore the previous pinned commit and generated skill files.

Release Notes

• User-facing change
• Internal-only change
• No release note needed

Release note draft:

N/A - internal agent guidance update only.