[SNMP] Update README.md for the version property (#5779)
[SNMP] Update README.md for the version property (#5779)

* Update README.me

according to https://github.com/openhab/openhab1-addons/issues/2426, the binding supports at least also version v2c. I tested it to make a COUNTER64 OID work (https://community.openhab.org/t/synology-disk-usage-and-snmp-binding/65869)
I wasn't able to test SET

* Update bundles/binding/org.openhab.binding.snmp/README.md

Co-Authored-By: on4tux <14e793d896ddc8ca6911747228e86464cf420065@tiri.be>

openhab/openhab,openhab/openhab,openhab/openhab,openhab/openhab,openhab/openhab,openhab/openhab