Correct a small typo error happening on two lines of the help command:
"specifified" instead of "specified".
" --version Show package version\n"
" --no-pager Do not pipe output into a pager\n"
" -a --all Show all groups, including empty\n"
- " -u --unit Show the subtrees of specifified system units\n"
- " --user-unit Show the subtrees of specifified user units\n"
+ " -u --unit Show the subtrees of specified system units\n"
+ " --user-unit Show the subtrees of specified user units\n"
" -l --full Do not ellipsize output\n"
" -k Include kernel threads in output\n"
" -M --machine= Show container\n"