README: Add pep as a contributor

Signed-off-by: Maxime “pep” Buquet <pep@bouah.net>
2 jobs from master in 1 minute and 10 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
passed #19716
docker
test

00:00:55

 
  Trigger
passed #19717
docker
trigger_poezio

00:00:14