libstdc++: Fix doxygen comment for std::out_ptr [PR124024]

libstdc++-v3/ChangeLog:

	PR libstdc++/124024
	* include/bits/out_ptr.h (out_ptr): Fix doxygen comment to refer
	to the right function.
	(inout_ptr): Improve markup in doxygen comment.

(cherry picked from commit a53eaa269058c0e382178505bb2b414132d04ded)
1 file changed