Add Debian 10 (Buster) to the supported os list.

Author: ScIT-Raphael

README.md

@@ -40,7 +40,7 @@ What does Hestia Control Panel support?
 
 Supported operating systems:
 ----------------------------
-* Debian 8 or 9
+* Debian 8, 9, 10
 * Ubuntu 16.04 LTS or Ubuntu 18.04 LTS (the latest LTS release is recommended)
 * **NOTE:** Hestia Control Panel must be installed on top of a fresh operating system installation to ensure proper functionality.