Fix RC 6 change log

Author: chrisseaton

CHANGELOG.md

@@ -1,13 +1,5 @@
 # 1.0
 
-# 1.0 RC 7
-
-Bug fixes:
-
-* `Kernel#singleton_methods` now correctly ignores prepended modules of
-  non-singleton classes. Fixes loading `sass` when `activesupport` is loaded.
-* Object identity numbers should never be negative.
-
 # 1.0 RC 6
 
 New features:
@@ -56,6 +48,9 @@ Bug fixes:
 * Fix definition of `RB_NIL_P` to be early enough. Fixes compilation of
   `msgpack`.
 * Fix compilation of megamorphic interop calls.
+* `Kernel#singleton_methods` now correctly ignores prepended modules of
+  non-singleton classes. Fixes loading `sass` when `activesupport` is loaded.
+* Object identity numbers should never be negative.
 
 Performance: