doc: sl-mx8mm: Mention OSM 1.1 support

The latest revision of the SoM is compliant to OSM 1.1.

Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
diff --git a/doc/board/kontron/sl-mx8mm.rst b/doc/board/kontron/sl-mx8mm.rst
index f022e09..57143b9 100644
--- a/doc/board/kontron/sl-mx8mm.rst
+++ b/doc/board/kontron/sl-mx8mm.rst
@@ -9,7 +9,7 @@
 The matching evaluation boards (Board-Line, BL) have two Ethernet ports,
 USB 2.0, HDMI/LVDS, SD card, CAN, RS485, RS232 and much more.
 
-The OSM-S i.MX8MM is compliant to the Open Standard Module (OSM) 1.0
+The OSM-S i.MX8MM is compliant to the Open Standard Module (OSM) 1.1
 specification, size S (https://sget.org/standards/osm).
 
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