### What?
disable optimistic_updates
So it no longer does that:
> If Kodiak is merging an out-of-date pull request that has running
status checks, update the pull request's branch without waiting for the
running status checks to finish.
The problem with that is that it cancels running checks and restarts
them.
Instead it waits for all running status checks before updating the PR.
### Why?
This should avoid the case where a PR is updated again and again without
yielding a result.
It also saves some CI cost
And it allows CI to finish and fill up the turborepo cache, which can
potentially used for the next run.
