chore(arcane): bump manager image to v2.11.1

[Xore]

Bumps the digest-pinned Arcane manager image v2.10.2 → v2.11.1 per the file's own upgrade procedure (#2382).

• Release: https://github.com/getarcaneapp/arcane/releases/tag/v2.11.1 (auth + passkey-MFA fixes, Trivy cpuset fallback for hosts without CFS quota, vuln-management disable per env, file-mode preservation, dashboard reliability)
• Digest: sha256:527af49cb544f4fea97848692761b8df5b328ea5b24e156318d570a3f2c0e884 (pulled + verified)
• Already deployed on the homeserver (hp-arcane recreated, Up healthy) — this PR keeps the repo in sync with the live stack.

Docs-only/one-line change; no code paths touched.

[github-actions]

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

Scanned Files

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