Bump cxx from 1.0.91 to 1.0.94 in /src/rs/tessellation

Bumps cxx from 1.0.91 to 1.0.94.

Release notes

Sourced from cxx's releases.

1.0.94

• Implement fmt::Write and io::Write for CxxString (#1202, thanks @​parasyte)

1.0.93

• Update syn dependency to 2.x

1.0.92

• Set html_root_url attribute for cxx-build and cxx-gen libraries

Commits

• 8d44aeb Release 1.0.94
• 5f66d60 Lockfile update
• 6eb0fdd Touch up PR 1202
• 9e317fc Merge pull request 1202 from parasyte/feature/fmt-write
• 695ff96 Implement fmt::Write and io::Write for CxxString
• e33fac6 Use error reporting provided by Meta
• cea0cef Release 1.0.93
• 9f59ba2 Merge pull request #1197 from dtolnay/syn
• 1259995 Update to syn 2
• a893a73 Lockfile update
• Additional commits viewable in compare view