Search index caching may be problematic after deployment

[cfa]

@lizmat and I just encountered the following issue:

• The documentation was updated, including the addition of new content: https://docs.raku.org/language/terms.html#term_nano
• @coke deployed the doc site, making the above available
• The link works but nano isn't found in the search bar, even after a force page reload;
  • …it is, however, found in an incognito browser session

In other words, there seems to be local caching (in the browser) of the search index. Ideally this should be refreshed following a site update/deployment.

[finanalyst]

@cfa please would you check this issue remains. The search functionality has been refactored. Search data is only loaded into the page when the search bar receives focus. The data is in a static file, so caching may still be a concern.