Small clarification in change log entry.

Author: aardvark179

CHANGELOG.md

@@ -11,7 +11,7 @@ Compatibility:
 
 * Fix `Array#fill` to raise `TypeError` instead of `ArgumentError` when the length argument is not numeric (#2652, @andrykonchin).
 * Warn when a global variable is not initialized (#2595, @andrykonchin).
-* Range literals are now created at parse time like in CRuby (#2622, @aardvark179).
+* Range literals of integers are now created at parse time like in CRuby (#2622, @aardvark179).
 
 Performance: