[CODEOWNERS] Update on request (#20007)

Updating the CODEOWNERS for Cosmos related PRs on request of Cosmos team.

Author: ronniegeraghty

CODEOWNERS

@@ -69,7 +69,7 @@
 /specification/containerservice/ @palma21 @weinong @seguler @alvinli222 @justindavies @matthchr @robbiezhang @paulgmiller @yizhang4321 @circy9 @qike-ms
 
 # PRLabel: %Cosmos
-/specification/cosmos-db/ @dmakwana @MehaKaushik @wmengmsft @shurd
+/specification/cosmos-db/ @pjohari-ms @MehaKaushik
 
 # PRLabel: %Customer Insights
 /specification/customer-insights/ @tjlvtao