media: doc: pixfmt-rgb: Fix V4L2_PIX_FMT_BGR24 format description

The V4L2_PIX_FMT_BGR24 format is incorrectly described, with the B and G
components swapped. Fix it.

Fixes: 2ac9280c ("media: doc: pixfmt-rgb: Make 8 bits per component table more compact")
Signed-off-by: NLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: NHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab@kernel.org>

Documentation/userspace-api/media/v4l/pixfmt-rgb.rst

@@ -672,8 +672,8 @@ nomenclature that instead use the order of components as seen in a 24- or
       - ``V4L2_PIX_FMT_BGR24``
       - 'BGR3'
 
-      - G\ :sub:`7-0`
       - B\ :sub:`7-0`
+      - G\ :sub:`7-0`
       - R\ :sub:`7-0`
       -
     * .. _V4L2-PIX-FMT-RGB24: