fix: typo on fcu page

* fix typo

* Update docs/pilots-corner/a32nx-briefing/flight-deck/glareshield/fcu.md

Co-authored-by: Sleinmaster <[email protected]>

---------

Co-authored-by: Sleinmaster <[email protected]>

Author: Luz5020

docs/pilots-corner/a32nx-briefing/flight-deck/glareshield/fcu.md

@@ -97,7 +97,7 @@ The flight crew uses this button to arm, activate, or disconnect the Autothrust
 
 The range of this value is between 100 and 49 000 feet.
 
-The outer knob switches the increment step-size for the inner know from 100 to 1000 and vice versa.
+The outer knob switches the step-size of the inner knob from 100 to 1000 and vice versa.
 
 The inner knob sets the altitude in the FCU windows in the chosen increment step-size.