Reword DistanceSensor doc to mention HC-SR04P

Author: bennuttall

gpiozero/input_devices.py

@@ -770,8 +770,9 @@ class DistanceSensor(SmoothedInputDevice):
 
     6. Finally, connect the VCC pin of the sensor to a 5V pin on the Pi.
 
-    Alternatively, 3V3 tolerant sensors (which no not require a voltage divider)
-    are also available.
+    Alternatively, the 3V3 tolerant HC-SR04P sensor (which does not require a
+    voltage divider) will work with this class.
+    
 
     .. note::