Bump vendor/gitlab.com/openconnect/ocserv from d6b1859 to f5b85f1

Bumps [vendor/gitlab.com/openconnect/ocserv](https://gitlab.com/openconnect/ocserv) from `d6b1859` to `f5b85f1`.
- [Release notes](https://gitlab.com/openconnect/ocserv/tags)
- [Commits](https://gitlab.com/openconnect/ocserv/compare/d6b18598cda306c35956e41bafa7920dd8dc29c8...f5b85f130ace7ed70566e01b97d98eb09cec3fef)

---
updated-dependencies:
- dependency-name: vendor/gitlab.com/openconnect/ocserv
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>