Fix typo in Greedy Search Description
# What does this PR do?
There is a small typographical error in the documentation for Greedy Search.
Fixes #22335 


- [x] This PR fixes a typo.



## Who can review?

@sgugger 



_The documentation is not available anymore as the PR was closed or merged._<|||||>@sgugger I rebased with main. All the CI checks pass now.<|||||>Thanks!