improve readme

Author: mevdschee

README.md

@@ -33,7 +33,7 @@ There are also proof-of-concept ports of this script that only support basic RES
     - SQL Server 2012 or higher (2017 for Linux support)
     - SQLite 3.16 or higher (spatial features NOT supported)
 
-Recommended platform: Ubuntu 20.04 or Debian 10
+Recommended operating system: Ubuntu 20.04 or Debian 10
 
 ## Installation