Update python.md

fixed variable names in the example 

temperature
ledSwitch

Author: akash73

content/arduino-cloud/01.guides/05.python/python.md

@@ -133,9 +133,9 @@ if __name__ == "__main__":
     logging_func()
     client = ArduinoCloudClient(device_id=DEVICE_ID, username=DEVICE_ID, password=SECRET_KEY)
 
-    client.register("test_value")  
-    client["test_value"] = 20
-    client.register("test_switch", value=None, on_write=on_switch_changed)
+    client.register("temperature")  
+    client["temperature"] = 20
+    client.register("ledSwitch", value=None, on_write=on_switch_changed)
 
     client.start()
 ```
@@ -168,4 +168,4 @@ For creating dashboards and linking variables, check out the [Dashboard & Widget
 
 - `command not found: python` - encountering this error when running a script indicates that the terminal can't access Python. You can try running `python3`, as some versions of Python requires this.
 - `Connection failed 5, retrying after 1.0s` - this error is likely due to an invalid **device ID** or **secret key**.
-- `ModuleNotFoundError: No module named '_m2crypto'` - likely if you are running an older version of the library. Try updating the library.
+- `ModuleNotFoundError: No module named '_m2crypto'` - likely if you are running an older version of the library. Try updating the library.