Fix search results filtering to match currently viewed version (#192)

* Initial plan

* Fix search bar to filter results by current page version

Agent-Logs-Url: https://github.com/jMonkeyEngine/wiki/sessions/d5de15ba-1f01-40b5-b07e-37102599727e

Co-authored-by: riccardobl <4943530+riccardobl@users.noreply.github.com>

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: riccardobl <4943530+riccardobl@users.noreply.github.com>

Author: Copilot

supplemental-ui/partials/footer-content.hbs

@@ -10,7 +10,7 @@ var search = docsearch({
   indexName: '{{env.ALGOLIA_IDX_NAME}}',
   inputSelector: '#search-input',
   autocompleteOptions: { hint: false, keyboardShortcuts: ['s'] },
-  algoliaOptions: { hitsPerPage: 10 }
+  algoliaOptions: { hitsPerPage: 10, facetFilters: ['version:{{page.version}}'] }
 }).autocomplete
 search.on('autocomplete:closed', function () { search.autocomplete.setVal() })
 function focusSearchInput () { document.querySelector('#search-input').focus() }