build(changelog): add new scope for CCA

Signed-off-by: Lauren Wehrmeister <lauren.wehrmeister@arm.com>
Change-Id: Iccba57a292e6668e6a6d93f1cb0e1633592a4009
diff --git a/changelog.yaml b/changelog.yaml
index 1a11c9b..fb8b936 100644
--- a/changelog.yaml
+++ b/changelog.yaml
@@ -89,6 +89,9 @@
       - title: Activity Monitors Extension (FEAT_AMU)
         scope: amu
 
+      - title: Confidential Compute Architecture (CCA)
+        scope: cca
+
       - title: Support for the `HCRX_EL2` register (FEAT_HCX)
         scope: hcx