fix: mark type of flat config export to satisfy Linter.Config[] (#10128)
### Description
Adds `satisfies Linter.Config[]` after the flat config definition. This
allows importing the config into other typescirpt configs without having
type unification issues.
### Testing Instructions
N/A this is a pretty simple type fix
Co-authored-by: Anthony Shew <anthony.shew@vercel.com>