fix misleading wording for required dependencies

Author: yucwan

articles/spring-cloud/spring-cloud-tutorial-prepare-app-deployment.md

@@ -124,11 +124,24 @@ For Spring Boot version 2.2 add the following dependency to the application POM
 </dependency>
 ```
 
-## Other required dependencies
+## Other recommended dependencies to enable Azure Spring Cloud features
 
-To enable the built-in features of Azure Spring Cloud, your application must include the following dependencies. This inclusion ensures that your application configures itself correctly with each component.
+To enable the corresponding built-in features of Azure Spring Cloud from service registry to distributed tracing, it is recommended to also include the following dependencies your application. 
 
-### EnableDiscoveryClient annotation
+### Service Registry
+
+To use the managed Azure Service Registry service, include the `spring-cloud-starter-netflix-eureka-client` dependency in the pom.xml file as shown here:
+
+```xml
+    <dependency>
+        <groupId>org.springframework.cloud</groupId>
+        <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
+    </dependency>
+```
+
+The endpoint of the Service Registry server is automatically injected as environment variables with your app. Applications can register themselves with the Service Registry server and discover other dependent microservices.
+
+#### EnableDiscoveryClient annotation
 
 Add the following annotation to the application source code.
 ```java
@@ -154,20 +167,7 @@ public class GatewayApplication {
 }
 ```
 
-### Service Registry dependency
-
-To use the managed Azure Service Registry service, include the `spring-cloud-starter-netflix-eureka-client` dependency in the pom.xml file as shown here:
-
-```xml
-    <dependency>
-        <groupId>org.springframework.cloud</groupId>
-        <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
-    </dependency>
-```
-
-The endpoint of the Service Registry server is automatically injected as environment variables with your app. Applications can register themselves with the Service Registry server and discover other dependent microservices.
-
-### Distributed Configuration dependency
+### Distributed Configuration
 
 To enable Distributed Configuration, include the following `spring-cloud-config-client` dependency in the dependencies section of your pom.xml file:
 
@@ -181,7 +181,7 @@ To enable Distributed Configuration, include the following `spring-cloud-config-
 > [!WARNING]
 > Don't specify `spring.cloud.config.enabled=false` in your bootstrap configuration. Otherwise, your application stops working with Config Server.
 
-### Metrics dependency
+### Metrics
 
 Include the `spring-boot-starter-actuator` dependency in the dependencies section of your pom.xml file as shown here:
 
@@ -194,7 +194,7 @@ Include the `spring-boot-starter-actuator` dependency in the dependencies sectio
 
  Metrics are periodically pulled from the JMX endpoints. You can visualize the metrics by using the Azure portal.
 
-### Distributed Tracing dependency
+### Distributed Tracing
 
 Include the following `spring-cloud-starter-sleuth` and `spring-cloud-starter-zipkin` dependencies in the dependencies section of your pom.xml file: