openvdb 8.1.0 update

[Luya Tshimbalanga]

Openvdb 8.1.0 is built on rawhide with so version updated to 8.1. 
Dependent packages like OpenImageIO
needs updates to resolves their dependencies.

See https://bodhi.fedoraproject.org/updates/FEDORA-2021-485cc4387a

-- 
Luya Tshimbalanga
Fedora Design Team
Fedora Design Suite maintainer