Move changelog to 3.0

Author: jacobtylerwalls

ChangeLog

@@ -15,6 +15,11 @@ Release date: TBA
   Closes #1780
   Refs #2140
 
+* Prefer standard library modules over same-named modules on sys.path. For example
+  ``import copy`` now finds ``copy`` instead of ``copy.py``. Solves ``no-member`` issues.
+
+  Closes pylint-dev/pylint#6535
+
 * Reduce file system access in ``ast_from_file()``.
 
 * Reduce time to ``import astroid`` by delaying ``astroid_bootstrapping()`` until
@@ -181,11 +186,6 @@ What's New in astroid 2.15.6?
 =============================
 Release date: TBA
 
-* Prefer standard library modules over same-named modules on sys.path. For example
-  ``import copy`` now finds ``copy`` instead of ``copy.py``. Solves ``no-member`` issues.
-
-  Closes pylint-dev/pylint#6535
-
 * Harden ``get_module_part()`` against ``"."``.
 
   Closes pylint-dev/pylint#8749