docs: usb: gadget: Reindent numbered list

Paragraphs that are part of a numbered list must be indented to render
correctly in html. Do that right here. There are only whitespace changes
in this patch.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Reviewed-by: Bagas Sanjaya <bagasdotme@gmail.com>
Link: https://lore.kernel.org/r/20250607224747.3653041-2-u.kleine-koenig@baylibre.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>