Bump version to 3.18.1 and stamp release date

Author: sfc-gh-pczajka

DESCRIPTION.md

@@ -7,7 +7,7 @@ https://docs.snowflake.com/
 Source code is also available at: https://github.com/snowflakedb/snowflake-connector-python
 
 # Release Notes
-- v3.19.0(TBD)
+- v3.18.1(July 15,2026)
   - N/A
 
 - v3.18.0(October 03,2025)

src/snowflake/connector/version.py

@@ -1,3 +1,3 @@
 # Update this for the versions
 # Don't change the forth version number from None
-VERSION = (3, 18, 0, None)
+VERSION = (3, 18, 1, None)