Update README.md

Signed-off-by: Siri Varma Vegiraju <[email protected]>

Author: siri-varma

examples/src/main/java/io/dapr/examples/conversation/README.md

@@ -109,7 +109,7 @@ sleep: 10
 -->
 
 ```bash
-dapr run --resources-path ./components/conversation --app-id myapp --app-port 8080 --dapr-http-port 3500 --dapr-grpc-port 51439  --log-level debug -- java -jar target/dapr-java-sdk-examples-exec.jar io.dapr.examples.conversation.DemoConversationAI
+dapr run --resources-path ./components/conversation --app-id myapp --app-port 8080 --dapr-http-port 3500 --dapr-grpc-port 51439  --log-level debug -- java -jar target/dapr-java-sdk-examples-exec.jar io.dapr.examples.conversation.UserMessageDemo
 ```
 
 <!-- END_STEP -->