fix: create a date field, but the database corresponding type is varchar

Co-authored-by: sheldon-welinga <sheldonwelinga@gmail.com>
Co-authored-by: gitstart_bot <gitstart_bot@users.noreply.github.com>

packages/nocodb-sdk/src/lib/sqlUi/MysqlUi.ts

@@ -999,7 +999,7 @@ export class MysqlUi {
         colProp.dt = 'varchar';
         break;
       case 'Date':
-        colProp.dt = 'varchar';
+        colProp.dt = 'date';
 
         break;
       case 'Year':