Update example: suppress error message from fc on bash (#37)

`'fc' -l 1` generated an error message on bash

README.md

@@ -172,7 +172,7 @@ fda() {
 
 # fh - repeat history
 fh() {
-  eval $(('fc' -l 1 || 'history') | fzf +s | sed 's/ *[0-9]* *//')
+  eval $(([ -n "$ZSH_NAME" ] && fc -l 1 || history) | fzf +s | sed 's/ *[0-9]* *//')
 }
 
 # fkill - kill process