message: Updating code owner for media services
diff: /specification/machinelearning/ @nonstatic2014
  /specification/machinelearningcompute/ @shutchings
  /specification/managementpartner/ @jeffrey-ace
  -/specification/mediaservices/ @brianblum
  +/specification/mediaservices/ @giakas
  /specification/mobileengagement/ @pshrosbree
  /specification/monitor/ @gucalder
  /specification/mysql/ @qingqingyuan
  