fix identity version (Azure#45249)

Author: lmolkova

sdk/onlineexperimentation/azure-resourcemanager-onlineexperimentation/pom.xml

@@ -67,7 +67,7 @@
     <dependency>
       <groupId>com.azure</groupId>
       <artifactId>azure-identity</artifactId>
-      <version>1.15.4</version> <!-- {x-version-update;com.azure:azure-identity;dependency} -->
+      <version>1.16.0</version> <!-- {x-version-update;com.azure:azure-identity;dependency} -->
       <scope>test</scope>
     </dependency>
   </dependencies>