Documentation/process: Update ARM contact for embargoed hardware issues

With Grant taking a prominent role in Linaro, I will take over as the
process ambassador for ARM w.r.t. embargoed hardware issues.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Grant Likely <grant.likely@arm.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/process/embargoed-hardware-issues.rst

@@ -244,7 +244,7 @@ disclosure of a particular issue, unless requested by a response team or by
 an involved disclosed party. The current ambassadors list:
 
   ============= ========================================================
-  ARM           Grant Likely <grant.likely@arm.com>
+  ARM		Catalin Marinas <catalin.marinas@arm.com>
   AMD		Tom Lendacky <tom.lendacky@amd.com>
   IBM Z         Christian Borntraeger <borntraeger@de.ibm.com>
   IBM Power     Anton Blanchard <anton@linux.ibm.com>