doc: migration-guide-3.6: update MIPI DBI display migration note

Update MIPI DBI display migration note to match the correct display
configuration settings for reset and MIPI DBI command pins after ILI9xxx
display was transitioned to this API.

Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>

doc/releases/migration-guide-3.6.rst

@@ -246,7 +246,9 @@ Device Drivers and Device Tree
 
 * ILI9XXX based displays now use the MIPI DBI driver class. These displays
   must now be declared within a MIPI DBI driver wrapper device, which will
-  manage interfacing with the display. For an example, see below:
+  manage interfacing with the display. Note that the `cmd-data-gpios` pin has
+  changed polarity with this update, to align better with the new
+  `dc-gpios` name. For an example, see below:
 
   .. code-block:: devicetree
 
@@ -269,7 +271,7 @@ Device Drivers and Device Tree
     mipi_dbi {
         compatible = "zephyr,mipi-dbi-spi";
         reset-gpios = <&gpio0 6 GPIO_ACTIVE_LOW>;
-        dc-gpios = <&gpio0 12 GPIO_ACTIVE_LOW>;
+        dc-gpios = <&gpio0 12 GPIO_ACTIVE_HIGH>;
         spi-dev = <&spi2>;
         #address-cells = <1>;
         #size-cells = <0>;