update CODEOWNERS for Service Fabric (#38753)

* update code owners for Service fabric

* remove jkochhar due to lack of public Azure member status

Author: iliu816

.github/CODEOWNERS

@@ -235,7 +235,8 @@
 /specification/servicebus/ @v-ajnava @dsouzaarun @damodaravadhani
 
 # PRLabel: %Service Fabric
-/specification/servicefabric/ @juhacket @samedder
+/specification/servicefabric/ @a-santamaria @iliu816
+/specification/servicefabricmanagedclusters/ @a-santamaria @iliu816
 
 # PRLabel: %SQL
 /specification/sql/ @jamestao @ericshape @jeremyfrosti @mitesh-pv @achyuth-ms