Update readme.md

readme.md

@@ -15,7 +15,7 @@ No: plugins/extensions system, ...
 * PHP 7.3+
 * PHP extensions: pdo, intl, json, mbstring, fileinfo
 * PHP extensions (suggests): imagick or gd (for upload avatars and other images), openssl (for send email via smtp server using SSL/TLS)
-* A database such as MySQL 5.5.3+, SQLite 3.25+, PostgreSQL 10+(?)
+* A database such as MySQL 5.5.3+, SQLite 3.25+, PostgreSQL 10+
 
 ## Install