stty: adjust --help to match POSIX 2024

[Collin Funk]

Hi,

In POSIX 2024, stty has the following change [1]:

    Austin Group Defects 1053, 1532, and 1687 are applied, changing the
    -g option and adding the rows number, cols number, and size
    operands.

Here is a patch updating the output of --help and documentation to
reflect the standardization of rows, cols, and size.

The -g change shouldn't affect us since it just clarifies that 'stty -g'
shouldn't have special characters that could be altered by file name
expansion by the shell.

Collin

[1] https://pubs.opengroup.org/onlinepubs/9799919799/utilities/stty.html

0001-stty-adjust-help-to-match-POSIX-2024.patch
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