Add yuanqu72 as a code owner for appconfiguration (#48079)

Author: mrm9084

.github/CODEOWNERS

@@ -53,7 +53,7 @@
 /sdk/ai/azure-ai-projects/    @dargilco @glharper @howieleung @kingernupur @nick863 @trangevi @trrwilson @bobogogo1990
 
 # PRLabel: %App Configuration
-/sdk/appconfiguration/    @avanigupta @jimmyca15 @mrm9084
+/sdk/appconfiguration/    @avanigupta @jimmyca15 @mrm9084 @yuanqu72
 
 # AzureSdkOwners: @mrm9084
 # ServiceLabel: %App Configuration