sudo apt update; sudo apt list --upgradable and check if snmp-mibs-downloader package is in that list. If you see it, feel free to sudo apt upgrade snmp-mibs-downloader -y if you only whish to update that package.
sudo apt update; sudo apt list --upgradable and check if snmp-mibs-downloader package is in that list. If you see it, feel free to sudo apt upgrade snmp-mibs-downloader -y if you only whish to update that package.