added some changes to changelog

Author: kolibril13

docs/source/changelog.rst

@@ -40,6 +40,17 @@ Config system
 #. Implement a :code:`manim.cfg` config file system, that consolidates the global configuration, the command line argument parsing, and some of the constants defined in :code:`constants.py`
 #. Added utilities for manipulating Manim’s :code:`.cfg` files.
 #. Added a subcommand structure for easier use of utilities managing :code:`.cfg` files
+#. Added utilities for manipulating Manim’s :code:`.cfg` files.
+#. Added a subcommand structure for easier use of utilities managing :code:`.cfg` files	#. Added a subcommand structure for easier use of utilities managing :code:`.cfg` files
+#. Also some Variables changed to the new config system:
+    #. `FRAME_HEIGHT` to `config["frame_width"]`
+    #. `TOP` to `config["frame_height"] / 2 * UP`
+    #. `BOTTOM` to `config["frame_height"] / 2 * DOWN`
+    #. `LEFT_SIDE` to `config["frame_width"] / 2 * LEFT`
+    #. `RIGHT_SIDE` to `config["frame_width"] / 2 * RIGHT`
+    #. `self.camera.frame_rate` to `config["frame_rate"]`
+
+
 
 
 Mobjects, Scenes, and Animations