hotfix for logger: use '%i' instead of '%zu'
hotfix for logger: use '%i' instead of '%zu'

Work-around for https://github.com/PX4/Firmware/issues/12485.

This can be reverted after the root-cause is fixed.

PX4/Firmware,PX4/Firmware,dagar/Firmware,krbeverx/Firmware,acfloria/Firmware,krbeverx/Firmware,dagar/Firmware,acfloria/Firmware,PX4/Firmware,acfloria/Firmware,dagar/Firmware,dagar/Firmware,dagar/Firmware,krbeverx/Firmware,dagar/Firmware,PX4/Firmware,acfloria/Firmware,krbeverx/Firmware,dagar/Firmware,acfloria/Firmware,acfloria/Firmware,PX4/Firmware,PX4/Firmware,krbeverx/Firmware,krbeverx/Firmware,krbeverx/Firmware,PX4/Firmware,acfloria/Firmware