Update version in README.md [skip ci]

Author: shivammathur

README.md

@@ -2,7 +2,7 @@
 
 <a href="https://github.com/shivammathur/php-ubuntu" title="PHP Package Cache"><img alt="Build status" src="https://github.com/shivammathur/php-ubuntu/workflows/Cache%20PHP/badge.svg"></a>
 <a href="https://github.com/shivammathur/php-ubuntu/blob/main/LICENSE" title="license"><img alt="LICENSE" src="https://img.shields.io/badge/license-MIT-428f7e.svg?logo=open%20source%20initiative&logoColor=white&labelColor=555555"></a>
-<a href="https://github.com/shivammathur/php-ubuntu/tree/main/builds" title="builds"><img alt="PHP Versions Supported" src="https://img.shields.io/badge/php-5.6%20to%208.4-777bb3.svg?logo=php&logoColor=white&labelColor=555555"></a>
+<a href="https://github.com/shivammathur/php-ubuntu/tree/main/builds" title="builds"><img alt="PHP Versions Supported" src="https://img.shields.io/badge/php-5.6%20to%208.5-777bb3.svg?logo=php&logoColor=white&labelColor=555555"></a>
 <a href="https://cloudsmith.io/~shivammathur/repos/php-ubuntu" title="mirror"><img alt="cloudsmith mirror" src="https://img.shields.io/badge/builds-cloudsmith-blue?logo=cloudsmith"></a>
 
 > Cache PHP packages for installing on GitHub Actions