Add `cabal check` to Haskell flake (#166) Get some assurance that Hackage will accept a published package.
| Time to Start | Worker time | Duration | Time to finish | |
| Config | 0s | 1s | 1s | 1s |
| Eval | 1s | 18s | 18s | 20s |
| Build | 20s | 1m04s | 1m06s | 1m27s |
| Suite | 0s | 1m24s | 1m27s | 1m27s |