OWNERS: add hexfusion as approver and remove joelegasse

Signed-off-by: Sam Batschelet <sbatsche@redhat.com>

OWNERS

@@ -6,6 +6,7 @@ approvers:
 - mitake
 - jpbetz
 - xiang90
+- hexfusion
 reviewers:
 - heyitsanthony
 - philips
@@ -17,4 +18,3 @@ reviewers:
 - wenjiaswe
 - jingyih
 - hexfusion
-- joelegasse