typo in column name

using the SqlRender mechanism, this fix will propagate to other flavors.

reveue_code_source_value was mispelled

Sql Server/OMOP CDM ddl - SQL Server.sql

@@ -613,7 +613,7 @@ CREATE TABLE cost
   payer_plan_period_id			INTEGER			NULL ,
   amount_allowed		FLOAT			NULL ,
   revenue_code_concept_id		INTEGER			NULL ,
-  reveue_code_source_value    VARCHAR(50)    NULL,
+  revenue_code_source_value    VARCHAR(50)    NULL,
   drg_concept_id			INTEGER		NULL,
   drg_source_value			CHAR(3)		NULL
 )