update changelog

Author: sfc-gh-aling

DESCRIPTION.md

@@ -10,8 +10,11 @@ Source code is also available at: https://github.com/snowflakedb/snowflake-conne
 
 - v3.3.0b1(September 13,2023)
 
-  - Updated arrow-nanoarrow dependency which improved error handling.
-  - Aligned error experience of corrupted arrow data with the GA versions.
+  - Version 3.3.0b1 is the snowflake-connector-python based on apache nanoarrow project, which
+reduces the package size as well as removes a hard dependency on a specific version of pyarrow.
+This version is built on top of v3.2.0, and it includes the following nanoarrow related improvements:
+    - Updated arrow-nanoarrow dependency which improved error handling.
+    - Aligned error experience of handling corrupted arrow data with the GA versions.
 
 - v3.2.0(September 06,2023)