Update OWNERS

Move `juanrh` and `sthaha` to emeritus, and add ourselves, and Mario to approvers as well.

Author: rexagod

OWNERS

@@ -5,24 +5,21 @@ reviewers:
   - simonpasquier
   - dgrisonnet
   - slashpai
-  - sthaha
   - raptorsun
   - jan--f
-  - juanrh
   - rexagod
   - machine424
+  - marioferh
 
 approvers:
   - simonpasquier
   - dgrisonnet
   - slashpai
-  - sthaha
   - raptorsun
   - jan--f
-  - juanrh
   - rexagod
   - machine424
-
+  - marioferh
 
 emeritus_approvers:
   - brancz
@@ -35,3 +32,5 @@ emeritus_approvers:
   - PhilipGough
   - arajkumar
   - JoaoBraveCoding
+  - sthaha
+  - juanrh