Updated some typos and formatting (#314)
Updated some typos and formatting (#314)

- Walked through the README, found a couple typos and fixed some GitHub
  formatting.

Signed-off-by: JJ Asghar <46483ceac9440fba9e500d920ac317af9e76f503@gmail.com>
jitsi/jibri,jitsi/jibri,jitsi/jibri