Fix error code in test to use BadArguments (1006)

Co-authored-by: BohuTANG <[email protected]>

Author: Copilot

tests/sqllogictests/suites/base/05_ddl/05_0060_ddl_alter_column_not_null.test

@@ -20,11 +20,11 @@ NULL 3
 d 4
 
 # Should fail: column 'a' contains NULL values
-statement error 1065
+statement error 1006
 ALTER TABLE test_alter_not_null MODIFY COLUMN a STRING NOT NULL;
 
 # Should fail: column 'b' contains NULL values
-statement error 1065
+statement error 1006
 ALTER TABLE test_alter_not_null MODIFY COLUMN b INT NOT NULL;
 
 statement ok