[FAB-10210] Clean up peers.md: grammar, fonts, dashes

Overall cleanup of peers.md, including:

 - grammar
 - wording
 - standardize on em dashes

Change-Id: Ic0a0d325002c41a4b68ca93beaf317ae8e4e6c59
Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>

Author: rpjday