SuppressWarningsHolder: align Javadoc with xdoc

SuppressWarningsHolder: align Javadoc with xdoc: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). While going through the checks to align Javadoc with the corresponding xdoc page, I noticed SuppressWarningsHolder is out of sync. Its Javadoc currently is just a…

The task

While going through the checks to align Javadoc with the corresponding xdoc page, I noticed `SuppressWarningsHolder` is out of sync. Its Javadoc currently is just a one-liner:

Part of FineEnvs/MiMo-V2.6-RL-harbor-code.