Docs: small search index improvements

docs/search-index/extract.js

@@ -17,7 +17,7 @@ const extractKeywords = (str) =>
       str
         .split(/[ -/]/)
         .map((word) => word.toLowerCase().replace(/[^a-z]/g, ''))
-        .filter((word) => word.length > 2 && !stopWords.includes(word))
+        .filter((word) => word.length > 2 && word.length < 15 && !stopWords.includes(word))
     )
   ].join(' ');
 

docs/search-index/stop-words.js

@@ -18,7 +18,9 @@ module.exports = [
   'does',
   'each',
   'either',
+  'ensure',
   'etc',
+  'every',
   'for',
   'from',
   'get',