Update readme to fit new version and add amd64 note.

README.md

@@ -2,7 +2,7 @@
 
 [Hestia Control Panel](https://www.hestiacp.com/)
 ==================================================
-**Latest stable release:** Version 1.3.0 | [View Changelog](https://github.com/hestiacp/hestiacp/blob/release/CHANGELOG.md)<br>
+**Latest stable release:** Version 1.3.1 | [View Changelog](https://github.com/hestiacp/hestiacp/blob/release/CHANGELOG.md)<br>
 
 **Web:** [www.hestiacp.com](https://www.hestiacp.com/)<br>
 **Documentation:** [docs.hestiacp.com](https://docs.hestiacp.com/)<br>
@@ -19,7 +19,7 @@ Hestia Control Panel is designed to provide administrators an easy to use web an
 Features and Services
 ----------------------------
 * Apache2 and NGINX with PHP-FPM
-* Multiple PHP versions (5.6 - 7.4, 7.3 as default for optimal compatibility)
+* Multiple PHP versions (5.6 - 7.4, 7.4 as default)
 * DNS Server (Bind) with clustering capabilities
 * POP/IMAP/SMTP mail services with Anti-Virus, Anti-Spam, and Webmail (ClamAV, SpamAssassin, and Roundcube)
 * MariaDB or PostgreSQL databases
@@ -28,8 +28,8 @@ Features and Services
 
 Supported operating systems
 ----------------------------
-* Debian 10, 9
-* Ubuntu 20.04 LTS, 18.04 LTS, or 16.04 LTS
+* Debian 10, 9 (amd64 only)
+* Ubuntu 20.04 LTS, 18.04 LTS, or 16.04 LTS (amd64 only)
 * **NOTE:** Hestia Control Panel must be installed on top of a fresh operating system installation to ensure proper functionality.
 
 Installing Hestia Control Panel