build(deps): Bump capnp from 0.26.0 to 0.26.1

Bumps [capnp](https://github.com/capnproto/capnproto-rust) from 0.26.0 to 0.26.1.
- [Commits](capnproto/capnproto-rust@capnp-v0.26.0...capnp-v0.26.1)

---
updated-dependencies:
- dependency-name: capnp
  dependency-version: 0.26.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]