fix: Fix the path to the Weather Agent in the weather_and_airbnb_planner README

Author: fjuma

samples/python/hosts/weather_and_airbnb_planner/README.md

@@ -136,7 +136,7 @@ Run the airbnb agent server:
 Open a new terminal and run the weather agent:
 
   ```bash
-  cd samples/multi_language/python_and_java_multiagent/weather_agent
+  cd samples/java/agents/weather_mcp
   mvn quarkus:dev
   ```