Reword compatibility sectin title

git-svn-id: https://svn.apache.org/repos/asf/jakarta/commons/proper/io/trunk@384022 13f79535-47bb-0310-9956-ffa450edef68

Author: Stephen Colebourne

RELEASE-NOTES.txt

@@ -15,8 +15,8 @@ Commons IO contains utility classes, stream implementations, file filters,
 and endian transformation classes.
 
 
-Incompatible changes from 1.1
------------------------------
+Compatibility with 1.1
+----------------------
 Binary compatible - Yes
 
 Source compatible - Yes