fix(test): close step token

Signed-off-by: Mike Nguyen <[email protected]>

Author: mikeee

examples/src/conversation/README.md

@@ -23,6 +23,8 @@ timeout: 60
 cargo build --examples
 ```
 
+<!-- END_STEP -->
+
 2. Run the example using the Dapr CLI
 
 <!-- STEP