Fixes small typo
Fixes small typo

Corrected word: appropriate

Signed-off-by: Kushal Das <1d6e1cf70ec6f9ab28d3ea4b27a49a77654d370e@kushaldas.in>

opencontainers/image-spec,vbatts/oci-image-spec,xiekeyang/image-tools,jonboulle/image-spec,jonboulle/image-spec,opencontainers/image-tools,mattspencer-arm/image-spec,vbatts/oci-image-spec,mattspencer-arm/image-spec,opencontainers/image-tools,xiekeyang/image-tools,opencontainers/image-spec