doc(man): add a hint about which UI element is the finder info (#2991)
doc(man): add a hint about which UI element is the finder info (#2991)

While reading the description of the --info flag, it's not
immediately obvious that the "finder info" is in fact the
UI element representing the match counters.
junegunn/fzf,junegunn/fzf,junegunn/fzf