fix format issue

Author: Cirilla-zmh

messaging-wrappers/README.md

@@ -47,15 +47,15 @@ detailed example, please check out [KafkaClientTest](./kafka-clients/src/test/ja
 To use OpenTelemetry in your project, you need to add the necessary dependencies. Below are the configurations for both
 Gradle and Maven.
 
-#### Gradle
+**Gradle**
 
 ```kotlin
 dependencies {
     implementation("io.opentelemetry.contrib:opentelemetry-messaging-wrappers-kafka-clients:${latest_version}")
 }
 ```
 
-#### Maven
+**Maven**
 
 ```xml
 <dependency>
@@ -125,15 +125,15 @@ custom message protocol. For detailed example, please check out [UserDefinedMess
 
 ### [Manual] Step 1 Add dependencies
 
-#### Gradle
+**Gradle**
 
 ```kotlin
 dependencies {
     implementation("io.opentelemetry.contrib:opentelemetry-messaging-wrappers-api:${latest_version}")
 }
 ```
 
-#### Maven
+**Maven**
 
 ```xml
 <dependency>
@@ -209,4 +209,3 @@ public class Demo {
 - [Steve Rao](https://github.com/steverao), Alibaba
 
 Learn more about component owners in [component_owners.yml](../.github/component_owners.yml).
-