Cisco Catalyst 9400 not showing the operating system version

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This has been asked before… example: https://github.com/librenms/librenms/issues/8244 & https://github.com/librenms/librenms/issues/9725

The current MIB is available here ftp://ftp.cisco.com/pub/mibs/v2/CISCO-PRODUCTS-MIB.my