docs: fix typo

fixes Fuco1#1214

smartparens.el

@@ -5853,7 +5853,7 @@ Pair object is anything delimited by pairs from `sp-pair-list'."
  (execute-kbd-macro cmd))))
 
 (defun sp-prefix-symbol-object (&optional _arg)
- "Read the command and invoke it on the next pair object.
+ "Read the command and invoke it on the next symbol object.
 
 If you specify a regular emacs prefix argument this is passed to
 the executed command. Therefore, executing