fix test and update description.md

Author: sfc-gh-nkumar

DESCRIPTION.md

@@ -13,6 +13,7 @@ Source code is also available at: https://github.com/snowflakedb/snowflake-conne
   - Fix compilation error when building from sources with libc++.
   - Pin lower versions of dependencies to oldest version without vulnerabilities.
   - Added no_proxy parameter for proxy configuration without using environmental variables.
+  - Fix string representation of INTERVAL YEAR and INTERVAL MONTH types.
 
 - v4.0.0(October 09,2025)
   - Added support for checking certificates revocation using revocation lists (CRLs)

test/unit/test_converter.py

@@ -131,5 +131,5 @@ def test_day_time_interval_decimal_to_timedelta(nanos):
 def test_year_month_interval_to_timedelta(months):
     converter = ArrowConverterContext()
     assert converter.INTERVAL_YEAR_MONTH_to_numpy_timedelta(
-        months
+        months, scale=0
     ) == numpy.timedelta64(months, "M")