fix: use correct method_id

Author: bout3fiddy

contracts/main/CurveTwocryptoFactoryHandler.vy

@@ -119,7 +119,7 @@ def _get_gauge_type(_gauge: address) -> int128:
     success, response = raw_call(
         GAUGE_CONTROLLER,
         concat(
-            method_id("gauge_type(address)"),
+            method_id("gauge_types(address)"),
             convert(_gauge, bytes32),
         ),
         max_outsize=32,