CI: Sort alphabetically zuul templates

Change-Id: I0c001c77bae17eace8c9ca9d94828d04101752fe

Author: mnasiadka

.zuul.d/project.yaml

@@ -1,13 +1,13 @@
 ---
 - project:
     templates:
+      - check-requirements
       - openstack-python3-jobs
       - openstack-python3-jobs-arm64
       - openstack-cover-jobs
-      - check-requirements
+      - periodic-stable-jobs
       - publish-openstack-docs-pti
       - release-notes-jobs-python3
-      - periodic-stable-jobs
     check:
       jobs:
         - kolla-tox-genconfig