I download the file "update-from-esxi6.5-6.5_update02.zip" after the searche on VMware site : "ESXi 6.5 update 2"
With WinSCP, I copy the file "update-from-esxi6.5-6.5_update02.zip", inside the DATASTORE.
With Putty, I open the shell (ssh), and I run this command :
esxcli software vib install -d /vmfs/volumes/5b116e9c-753b0aec-06f4-801844ed2322/Updates_ESXi_65/update-from-esxi6.5-6.5_update02.zip
And after that, I need to reboot the server.