fix another DSP deprecation

Author: baggepinnen

docs/src/man/creating_systems.md

@@ -497,9 +497,10 @@ Filters can be designed using [DSP.jl](https://docs.juliadsp.org/stable/filters/
 using DSP, ControlSystemsBase, Plots
 
 fs = 100
-df = digitalfilter(Bandpass(5, 10; fs), Butterworth(2))
+df = digitalfilter(Bandpass(5, 10), Butterworth(2); fs)
 G = tf(df, 1/fs) # Sample time must be provided in the conversion to get the correct frequency scale in the Bode plot
 bodeplot(G, xscale=:identity, yscale=:identity, hz=true)
+vline!([5 10], l=(:black, :dash), label="Band-pass limits", sp=1)
 ```
 
 See also