fix(specs): Separators are non-alphanumeric characters (#3978)

Co-authored-by: Gary Conroy <gary.conroy@LON-M3P-GConroy.local>

specs/common/schemas/IndexSettings.yml

@@ -212,12 +212,15 @@ baseIndexSettings:
       type: string
       example: +#
       description: |
-        Controls which separators are indexed.
+        Control which non-alphanumeric characters are indexed.
+
+        By default, Algolia ignores [non-alphanumeric characters](https://www.algolia.com/doc/guides/managing-results/optimize-search-results/typo-tolerance/how-to/how-to-search-in-hyphenated-attributes/#handling-non-alphanumeric-characters) like hyphen (`-`), plus (`+`), and parentheses (`(`,`)`).
+        To include such characters, define them with `separatorsToIndex`.
 
         Separators are all non-letter characters except spaces and currency characters, such as $€£¥.
-        By default, separator characters aren't indexed.
+
         With `separatorsToIndex`, Algolia treats separator characters as separate words.
-        For example, a search for `C#` would report two matches.
+        For example, in a search for "Disney+", Algolia considers "Disney" and "+" as two separate words.
       default: ''
       x-categories:
         - Typos