doc: fixes #5

Unicode extension overrides NOCASE collation.

docs/unicode.md

@@ -6,6 +6,8 @@ This extension implements true UNICODE functionality for SQLite in regards of ca
 -   `unaccent()` function to normalize strings for comparison by removing accents.
 -   `LIKE` operator that uses casefolding to provide case-independent matching.
 
+Overrides the default NOCASE case-insensitive collation sequence to support UTF-8 characters.
+
 Has no external dependencies (like libicu). Adapted from [sqlite3_unicode](https://github.com/Zensey/sqlite3_unicode) by Anton Litvinov.
 
 [Download](https://github.com/nalgeon/sqlite-plus/releases/latest)