CI should check if new docs need to be generated

### Describe the bug

https://github.com/apache/datafusion-comet/pull/2422 Changed a config default, which in turn generates new docs with `make`. However this PR did not include the docs change, so if you run `make` on main branch you get new docs. See #2428.

### Steps to reproduce

_No response_

### Expected behavior

_No response_

### Additional context

_No response_