Docs/mb/starlabs/byte_adl.md: Fix embedded rST syntax

MyST Parser uses {eval-rst} to denote embedded reStructuredText blocks,
not eval_rst as was previously used by recommonmark.

Change-Id: I3476d205605675690eb0d434f4ae9b7b2f091748
Signed-off-by: Nicholas Chin <nic.c3.14@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/84238
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

Documentation/mainboard/starlabs/byte_adl.md

@@ -60,7 +60,7 @@ make
 
 ## Flashing coreboot
 
-```eval_rst
+```{eval-rst}
 +---------------------+------------+
 | Type                | Value      |
 +=====================+============+