fix(SW-188): more semantic name for tolang transformer function

server/routers/hotels/output.ts

@@ -1,6 +1,6 @@
 import { z } from "zod"
 
-import { fromUppercaseToLangEnum } from "@/server/utils"
+import { toLang } from "@/server/utils"
 
 const RatingsSchema = z
   .object({
@@ -423,11 +423,11 @@ export const getHotelDataSchema = z.object({
     type: z.string(), // No enum here but the standard return appears to be "hotels".
     language: z
       .string()
-      .refine((val) => fromUppercaseToLangEnum(val) !== undefined, {
+      .refine((val) => toLang(val) !== undefined, {
         message: "Invalid language",
       })
       .transform((val) => {
-        const lang = fromUppercaseToLangEnum(val)
+        const lang = toLang(val)
         if (!lang) {
           throw new Error("Invalid language")
         }