Search onclick finds items not containing onclick

### Summary

1 On https://docs.expo.dev/ in Search enter:

onclick

2 Expected: articles containing onclick, or "None found"
4 Articles not containing onclick e.g.



### Link to the related docs page

https://docs.expo.dev/

Reproduce the issue at https://docs.expo.dev/ by searching for "onclick", then trace the docs search entry point and its result-matching logic. Done means results contain the search term or the interface reports "None found" when there are no matches.

Written by the indexing model from the issue text.