Fix the readme typo (#2436)
Fix the readme typo (#2436)

The blank source is named blank, not none

Signed-off-by: Vladimir Pouzanov <fa49cdbb464c3f0309fcae026d56eb8098a8f7ef@gmail.com>

Signed-off-by: Vladimir Pouzanov <fa49cdbb464c3f0309fcae026d56eb8098a8f7ef@gmail.com>
kubevirt/containerized-data-importer,kubevirt/containerized-data-importer,kubevirt/containerized-data-importer