Update README.md

Author: praveen-db2

README.md

@@ -4,7 +4,7 @@ Interface for PHP to DB2 for z/OS, DB2 for LUW, DB2 for i.
 
 ## Pre-requisites
 
-Install PHP 7.4 and above. The minimum PHP version supported by driver is PHP 7.4 and the latest version supported is PHP 8.1.
+The minimum PHP version supported by driver is PHP 7.3 and the latest version supported is PHP 8.1.
 
 ## IBM i users