chore: update the owners for recenet CAPA changes

This update the owners for the image promotion with recent changes
to the maintainers of CAPA.

Signed-off-by: Richard Case <[email protected]>

Author: richardcase

registry.k8s.io/images/k8s-staging-cluster-api-aws/OWNERS

@@ -4,7 +4,8 @@ approvers:
 - richardcase
 - Ankitasw
 - dlipovetsky
-- vincepri
+- nrb
+- AndiDog
 
 emeritus_approvers:
 - chuckha
@@ -14,4 +15,5 @@ emeritus_approvers:
 - rudoi
 - sedefsavas
 - Skarlso
+- vincepri