ci: bump Apple branch

Signed-off-by: Marc Poulhiès <[email protected]>

Author: dkm

.github/workflows/ccpp.yml

@@ -392,7 +392,7 @@ jobs:
           git fetch arm-ian;
           GIT_AUTHOR_NAME=CI \
           GIT_AUTHOR_EMAIL='ci@invalid' \
-          git merge --no-edit e110b7b04a6df1275330455aa886a6e283d06e48;
+          git merge --no-edit master-wip-apple-si-on-r16-4308-g50959e53e40ae0;
 
     - name: Install Deps
       run: |