docs: clarify cauer low pass analog filter intro

Author: jvaverka

docs/src/tutorials/cauer_low_pass_analog.md

@@ -3,7 +3,7 @@
 The example Cauer Filter is a low-pass filter of the fifth order.
 It is realized using an analog network.
 The [`Electrical.Voltage`](@ref) source is the input voltage (whose value varies as defined by [`Blocks.Step`](@ref)), and the `resistor.p.v` is the filter output voltage.
-The pulse response is calculated.
+The step response is calculated.
 
 ## Copy-Pastable Example