SIG-MC leadership change: pmorie emeritus, skitt co-chair

pmorie moving to emeritus, skitt becoming co-chair, jeremyot
unchanged; see
https://groups.google.com/g/kubernetes-sig-multicluster/c/xhj2OnFO-8M
for the discussion and lazy consensus (deadline July 1, 2024).

Signed-off-by: Stephen Kitt <[email protected]>

Author: skitt

OWNERS_ALIASES

@@ -65,7 +65,7 @@ aliases:
     - upodroid
   sig-multicluster-leads:
     - jeremyot
-    - pmorie
+    - skitt
   sig-network-leads:
     - aojea
     - danwinship