Minor punctuation correction in README.md
Minor punctuation correction in README.md

Signed-off-by: Bert Roos <7b964cd933b2cc9106deabd4641111826cfbc094@famroos.nu>

HuKeping/notary,docker/notary,jfrazelle/notary,docker/notary,jfrazelle/notary,HuKeping/notary,jfrazelle/notary,HuKeping/notary,docker/notary