Fixing image manifest schema2 medaitype typo in docs.
Fixing image manifest schema2 medaitype typo in docs.

Signed-off-by: Ina Panova <106db9e0cc7911e3189b433770d932b1e3e4c45c@redhat.com>

konstruktoid/distribution,miminar/distribution,estesp/distribution,manoj535/distribution,yuwaMSFT2/distribution,vdemeester/distribution,miminar/distribution,sadlil/distribution,sadlil/distribution,shyr/distribution,huamai-io/distribution,mikebrow/distribution,duglin/distribution,estesp/distribution,jwhonce/distribution,docker/distribution,vdemeester/distribution,jzwlqx/distribution,dmcgowan/distribution,yuwaMSFT2/distribution,jzwlqx/distribution,huamai-io/distribution,thaJeztah/distribution,sergeyfd/distribution,cezarsa/distribution,cezarsa/distribution,duglin/distribution,docker/distribution,sergeyfd/distribution,jwhonce/distribution,konstruktoid/distribution,mikebrow/distribution,manoj535/distribution,dmcgowan/distribution,shyr/distribution,thaJeztah/distribution