Update CHANGELOG.md

CHANGELOG.md

@@ -42,7 +42,15 @@
 ## Images
 
 - Fixed images not appearing in st.
-
+- Added `to_ascii()` and `to_off()`.
+    - These functions are used when falling back to different image modes.
+- Renamed `$image_backend` to `$image_program`.
+- Renamed `$image` to `$image_backend`.
+- Renamed `$padding` to `$text_padding`.
+- Renamed `$imgname` to `$img_name`.
+- Renamed `$img` to `$image`.
+- Renamed `check_old_flags()` to `old_flags()` to match `old_functions()`.
+- Split `get_image()` into `get_term_size()`, `get_image_size()`, `get_image_program()` and `make_thumbnail()`.
 
 ## Info