Update README

README

@@ -14,5 +14,5 @@ Run: ./scripts/feess install -a -p packages
 
 Please make sure that all packages you commit or request to pull:
 	* Package a version which is still maintained by the upstream author.
-        * Have yourself or another person listed in the PKG_MAINTAINER field.
+        * Have yourself or another person listed in the (PKG_)MAINTAINER field.
 	* Will be updated regularly to maintained and supported versions.