docs: link to man page in MPG example

Author: hansu

docs/src/examples/mpg.adoc

@@ -78,7 +78,7 @@ net encoder-counts => axis.z.jog-counts
 ----
 
 If the machine is capable of high acceleration to smooth out the moves
-for each click of the MPG use the <<sec:ilowpass,ilowpass>> component to
+for each click of the MPG use the link:../man/man9/ilowpass.9.html[ilowpass] component to
 limit the acceleration.
 
 .jog.hal with ilowpass