Add CNCF project reference
Add CNCF project reference

https://www.cncf.io/blog/2018/01/29/cncf-host-rook-project-cloud-native-storage-capabilities/

Signed-off-by: Chris Aniszczyk <2a3e0ec6821d10bf53e535c46e422f24d94584b5@gmail.com>

rook/rook,rook/rook,rook/rook,rook/nfs,rook/rook,rook/rook,rook/nfs,rook/nfs