Fix kiss_icp_dump_config executable

[benemer]

The function called with the kiss_icp_dump_config executable does not exist, I changed it to the correct write_config function.

[nachovizzo]

Do we use this function? 🤔 I forgot we had it there

[benemer]

The write_dump_config does not exist; the write_config is used by the pipeline to save the config after the run. The executable we added also uses this function to dump a default config as a template if you want to modify some parameters.