build(changelog): move mte to mte2

With commit:
https://review.trustedfirmware.org/c/TF-A/trusted-firmware-a/+/27122?tab=comments

FEAT_MTE is removed and we have only FEAT_MTE2, so update change log
to reflect the same.

Change-Id: I9f3bd7053f9c1fa355168968f412374e1c4937d4
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
1 file changed