Fix cortex validation error (snowflakedb#11)

fix cortex validation error

Author: sfc-gh-cgorrie

snowflake-cortex/app/setup_script.sql

@@ -11,7 +11,7 @@ GRANT USAGE ON SCHEMA core TO APPLICATION ROLE app_public;
 
 -- 3. Create a streamlit object using the code you wrote in you wrote in src/module-ui, as shown below. 
 -- The `from` value is derived from the stage path described in snowflake.yml
-CREATE STREAMLIT core.ui
+CREATE OR REPLACE STREAMLIT core.ui
      FROM '/streamlit/'
      MAIN_FILE = 'dashboard.py';