[BUG] New search engine does not match complete extension name

[oddhack]

After the most recent docs update (spec revision 1.4.307), I searched for a new extension, "VK_NV_cluster_acceleration_structure", and nothing came up when I pasted the name into the searchbox. After some experimentation I found that it would turn up the correct extension appendix link (and other lower-ranked but correct results) when I typed in partial prefixes up to "VK_NV_cluster_acceleration_structu", but adding the next "r" discarded all the previous matches and showed an empty result. Same result when searching for "VK_NV_partitioned_acceleration_structure" - results seem sensible up to the "...structu" and adding the following "r" empties the search results. So it's not just the length of the search term, but something else about it that's triggering the problem.