Bump up changelog's 'new entries' notice to just bellow new Swift 4.1 section

Author: LuizZak

CHANGELOG.md

@@ -102,6 +102,8 @@ Swift 4.1
 
   If you wish to provide your own implementation of `==`/`hashValue`, you still can; a custom implementation will replace the one synthesized by the compiler.
 
+  **Add new entries to the top of this file, not here!**
+
 Swift 4.0
 ---------
 
@@ -391,8 +393,6 @@ Swift 4.0
   #define LIMITED (SMALL || TINY)   // now imported as Bool.
   ```
 
-  **Add new entries to the top of this file, not here!**
-
 Swift 3.1
 ---------