ASoC: audio-graph-card2: Update comment with renamed file path

The "sound/soc/sh" directory has been renamed to "sound/soc/renesas".
Update the comment in audio-graph-card2.c to reflect the new file path
for better accuracy.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://patch.msgid.link/20241025150511.722040-4-prabhakar.mahadev-lad.rj@bp.renesas.com


Signed-off-by: Mark Brown <broonie@kernel.org>