update CHANGES.md

Author: b-yogesh

chartlets.js/CHANGES.md

@@ -42,6 +42,7 @@
   - `RadioGroup` and `Radio`
   - `Switch`
   - `Tabs`
+  - `Slider`
 
 * Supporting `tooltip` property for interactive MUI components.
 

chartlets.py/CHANGES.md

@@ -22,6 +22,7 @@
   - `Switch`
   - `RadioGroup` and `Radio`
   - `Tabs`
+  - `Slider`
 
 ## Version 0.0.29 (from 2024/11/26)