logger: use reference in range based loop (#28894)

old-commit-hash: f1a1456f27

system/loggerd/logger.cc

@@ -83,7 +83,7 @@ kj::Array<capnp::word> logger_build_init_data() {
   }
 
   int i = log_commands.size();
-  for (auto [key, value] : hw_logs) {
+  for (auto &[key, value] : hw_logs) {
     auto lentry = commands[i];
     lentry.setKey(key);
     lentry.setValue(capnp::Data::Reader((const kj::byte*)value.data(), value.size()));