MAINTAINERS: NXP: separate NXP Robotics from mainline

Added a "platform: NXP Robotics" label to avoid duplicate NXP
areas from having the same label. This was causing the wrong
assignees to be automatically assigned to issues labeled with
"platform: NXP"

Signed-off-by: David Leach <david.leach@nxp.com>

MAINTAINERS.yml

diff --git a/MAINTAINERS.yml b/MAINTAINERS.yml
index d88c45e..cec7c14 100644
--- a/MAINTAINERS.yml
+++ b/MAINTAINERS.yml
@@ -3913,7 +3913,7 @@
     - boards/nxp/rddrone_fmuk66/
     - boards/nxp/mr_canhubk3/
   labels:
-    - "platform: NXP"
+    - "platform: NXP Robotics"
   description: NXP Robotics Module Platform Products
 
 Microchip MEC Platforms: