fix changes to filtering

Author: Dilmi Wickramanayake

examples/nidaqmx_analog_input_filtering/nidaqmx_analog_input_filtering.py

@@ -32,6 +32,8 @@
         panel.set_value("is_running", True)
         panel.set_value("stop_button", False)
 
+        # How to use nidaqmx: https://nidaqmx-python.readthedocs.io/en/stable/
+
         # How to use nidaqmx: https://nidaqmx-python.readthedocs.io/en/stable/
         with nidaqmx.Task() as task:
             chan_type = panel.get_value("chan_type", "1")