Add key-bindings for fzf-ripgrep example

Examples.md

@@ -324,6 +324,8 @@ FZF_DEFAULT_COMMAND="rg --files" fzf \
   --ansi \
   --phony \
   --reverse \
+  --bind "ctrl-a:select-all" \
+  --bind "f12:execute-silent:(subl -b {})" \
   --bind "change:reload:$RG_DEFAULT_COMMAND {q} || true" \
   --preview "rg -i --pretty --context 2 {q} {}" | cut -d":" -f1,2
 )