board: toradex: apalis-imx8: fix file names in maintainers

Fix device tree file names in MAINTAINERS file.

Fixes: 3d6036650059 ("board: toradex: add apalis imx8qm 4gb wb it v1.0b module support")
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
1 file changed