fix: fetch move out step from cond

Author: ronag

lib/fetch/index.js

@@ -434,13 +434,13 @@ function fetching ({
 
     // 3. Append `Accept`/value to request’s header list.
     request.headersList.append('accept', value)
+  }
 
-    // 12. If request’s header list does not contain `Accept-Language`, then
-    // user agents should append `Accept-Language`/an appropriate value to
-    // request’s header list.
-    if (!request.headersList.has('accept-language')) {
-      request.headersList.append('accept-language', '*')
-    }
+  // 12. If request’s header list does not contain `Accept-Language`, then
+  // user agents should append `Accept-Language`/an appropriate value to
+  // request’s header list.
+  if (!request.headersList.has('accept-language')) {
+    request.headersList.append('accept-language', '*')
   }
 
   // 13. If request’s priority is null, then use request’s initiator and