fix: urlencoded not switching to formdata

packages/hoppscotch-app/newstore/RESTSession.ts

@@ -219,6 +219,7 @@ const dispatchers = defineDispatchers({
           curr.request.body.contentType === "application/x-www-form-urlencoded"
         ) {
           return {
+            request: {
               ...curr.request,
               body: <HoppRESTReqBody>{
                 contentType: "multipart/form-data",
@@ -231,6 +232,7 @@ const dispatchers = defineDispatchers({
                   )
                 ),
               },
+            },
           }
         }