[CODEOWNERS] Fix issue where api review file owner rule not matched

Last rule wins, so specific library directory owners override the api
review file owner. Fixing it by move the api review rule after sdk
rules.

.github/CODEOWNERS

@@ -8,9 +8,6 @@
 # Catch all
 /sdk/ @ramya-rao-a
 
-# API review files
-/sdk/**/review/*api.md @bterlson
-
 # Core
 /sdk/core/abort-controller/ @chradek
 /sdk/core/core-amqp/ @ramya-rao-a @chradek
@@ -36,6 +33,9 @@
 
 /sdk/test-utils/ @HarshaNalluru
 
+# API review files
+/sdk/**/review/*api.md @bterlson
+
 # Management Plane
 /**/*Management*.ts @qiaozha
 /**/arm-*/ @qiaozha