security/headscale: Update to 0.27.0

Notable changes: Minimum supported Tailscale client version: v1.64.0

Changes since 0.26.1

• https://github.com/juanfont/headscale/releases/tag/v0.27.0

PR: 290783
Approved by: Michael Muenz <m.muenz@gmail.com> (maintainer)