v1.20260227.1

What's Changed

• throw appropriate error on websocket close by @anonrig in https://github.com/cloudflare/workerd/pull/6175
• update capnp and workerd-cxx by @mikea in https://github.com/cloudflare/workerd/pull/6192

Full Changelog: https://github.com/cloudflare/workerd/compare/v1.20260226.1...v1.20260227.1