nproc: Avoid making StringView of temporary ByteBuffer

Author: https://github.com/BenWiederhake
Commit: d9c1162a20
Pull-request: https://github.com/SerenityOS/serenity/pull/9946
Reviewed-by: https://github.com/IdanHo ✅

Userland/Utilities/nproc.cpp

@@ -22,7 +22,8 @@ int main()
         return 1;
     }
 
-    auto json = JsonValue::from_string({ file->read_all() });
+    auto buffer = file->read_all();
+    auto json = JsonValue::from_string({ buffer });
     auto cpuinfo_array = json.value().as_array();
     outln("{}", cpuinfo_array.size());