fix: update turbo-types with concurrency option (#10379)
### Description
This is a follow-up fix to:
https://github.com/vercel/turborepo/pull/10236
Unfortunately I didn't notice `turbo-types` is where the schema actually
lives and is generated from, so the configuration schema never got
updated to support this option.
### Testing Instructions
1. Install turborepo 2.5.1
2. Add a "concurrency" option to your `turbo.json`
3. Observe that using the public schema URL in `$schema` flags the
concurrency option as an unknown property.
4. Clone this branch
5. Change the path in `$schema` to point to the schema in this branch
6. Observe the previous warning goes away.
