Updating owners for EventGrid (Azure#9320)

* Updating code owners for event gris

* Updating code owners for EVent Grid

Author: Kishp01

CODEOWNERS

@@ -26,7 +26,7 @@
 /specification/dns/ @owolabi2
 /specification/documentdb/ @dmakwana
 /specification/domainservices/ @jihochang
-/specification/eventgrid/ @kalyanaj
+/specification/eventgrid/ @Kishp01 @ahamad-MS
 /specification/eventhub/ @v-ajnava
 /specification/features/ @stankovski
 /specification/graphrbac/ @lmazuel @yugangw-msft @amarzavery