docs: Move the CHANGELOG to Release Notes (#909)

Author: RobLoach

Readme.md

@@ -147,9 +147,7 @@ Reviewing changes to `src/*` and `nuklear.h`:
   * Indentation.
   * Curly bracket (`{}`) placement.
 * Ensure that the contributor has bumped the appropriate version in
-  [clib.json](https://github.com/Immediate-Mode-UI/Nuklear/blob/master/clib.json)
-  and added their changes to the
-  [CHANGELOG](https://github.com/Immediate-Mode-UI/Nuklear/blob/master/src/CHANGELOG).
+  [clib.json](https://github.com/Immediate-Mode-UI/Nuklear/blob/master/clib.json).
 * Have at least one other person review the changes before merging.
 
 Reviewing changes to `demo/*`, `example/*` and other files in the repo: