Update readme

Author: trowski

README.md

@@ -4,15 +4,15 @@ This package provides interfaces and classes shared by [`amphp/mysql`](https://g
 
 ## Requirements
 
-- PHP 7.0+
+- PHP 8.1+
 
 ## Versioning
 
 `amphp/sql` follows the [semver](http://semver.org/) semantic versioning specification like all other `amphp` packages.
 
 ## Security
 
-If you discover any security related issues, please email [`contact@amphp.org`](mailto:contact@amphp.org) instead of using the issue tracker.
+If you discover any security related issues, please use the private security issue reporter instead of using the public issue tracker.
 
 ## License