Fix Snowflake extension ref to use working commit 75ab20e

- Updated ref from 109fdfd to 75ab20e (successful workflow #75)
- This fixes the Load method override compilation error
- Both ref and ref_next now point to the working commit

Author: venkata-chikkam

extensions/snowflake/description.yml

@@ -10,7 +10,7 @@ extension:
 
 repo:
   github: iqea-ai/duckdb-snowflake
-  ref: 109fdfdbb94fc4108381a69a00a8292124ee083a
+  ref: 75ab20e7349beaff184fcd3f98efbd90bcd7d812
   ref_next: 75ab20e7349beaff184fcd3f98efbd90bcd7d812
 
 install_notes: |