Add missing line to MVC config interceptors snippet

To ensure consistency with Kotlin and XML snippets.

framework-docs/src/main/java/org/springframework/docs/web/webmvc/mvcconfig/mvcconfiginterceptors/WebConfiguration.java

@@ -19,6 +19,7 @@ package org.springframework.docs.web.webmvc.mvcconfig.mvcconfiginterceptors;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
 import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+import org.springframework.web.servlet.handler.UserRoleAuthorizationInterceptor;
 import org.springframework.web.servlet.i18n.LocaleChangeInterceptor;
 
 // tag::snippet[]
@@ -28,6 +29,7 @@ public class WebConfiguration implements WebMvcConfigurer {
 	@Override
 	public void addInterceptors(InterceptorRegistry registry) {
 		registry.addInterceptor(new LocaleChangeInterceptor());
+		registry.addInterceptor(new UserRoleAuthorizationInterceptor()).addPathPatterns("/**").excludePathPatterns("/admin/**");
 	}
 }
 // end::snippet[]