test/extended/prometheus/OWNERS: refresh members
This change updates the list of reviewers and approvers to be consistent
with the current team structure.
reviewers:
-- brancz
-- LiliC
- squat
-- s-urbaniak
- paulfantom
-- metalmatze
+- simonpasquier
+- dgrisonnet
+- jan--f
approvers:
-- brancz
-- LiliC
- squat
-- s-urbaniak
- paulfantom
-- metalmatze
+- simonpasquier
+- dgrisonnet
+- jan--f
