Chore: change User-Agent

Build/lib/fetch-retry.ts

@@ -153,7 +153,7 @@ export class ResponseError<T extends UndiciResponseData | Response> extends Erro
 
 export const defaultRequestInit = {
   headers: {
-    'User-Agent': 'curl/8.12.1 (https://github.com/SukkaW/Surge)'
+    'User-Agent': 'node-fetch'
   }
 };