Fix erratum in output of "fb_lock_print -?" [CORE5261]

[firebird-automations]

Submitted by: @pavel-zotov

/opt/fb30ss/bin/fb_lock_print -?
Firebird lock print utility.
. . .
-h print recent events history
-a print all of the above (equal to -o -l -r -h swithes)

Correct please: "swithes" --> switChes.