[doc/fix] doxygen typo

in/out is not valid doxygen.
6 jobs for fix-doc in 25 minutes and 18 seconds (queued for 1 second)
Status Job ID Name Coverage
  Style
passed #46230
integration
checkpatch

00:03:15

passed #46229
integration
repoquality

00:14:26

passed #46231
integration
style:docs

00:19:41

 
  Build
passed #46232
make:generic

00:01:35

passed #46234
knl
make:knl

00:02:28

passed #46233
make:out-of-tree

00:01:33