Include Modal.com in benchmarking

[thundergolfer]

👋, I saw this project in gVisor's forums: https://groups.google.com/g/gvisor-users/c/DV6JUD3MrZc.

We at modal.com also use gVisor in our serverless runtime.

Would you accept Modal's inclusion in your serverless benchmarking? I want to see how we stack up 😏.