ci: Make sure caches are updated in security scheduled pipelines

Signed-off-by: Rémy Coutable <remy@rymai.me>

.gitlab/ci/rules.gitlab-ci.yml

@@ -46,6 +46,9 @@
 .if-security-merge-request: &if-security-merge-request
   if: '$CI_PROJECT_NAMESPACE == "gitlab-org/security" && $CI_MERGE_REQUEST_IID'
 
+.if-security-schedule: &if-security-schedule
+  if: '$CI_PROJECT_NAMESPACE == "gitlab-org/security" && $CI_PIPELINE_SOURCE == "schedule"'
+
 .if-dot-com-gitlab-org-schedule: &if-dot-com-gitlab-org-schedule
   if: '$CI_SERVER_HOST == "gitlab.com" && $CI_PROJECT_NAMESPACE == "gitlab-org" && $CI_PIPELINE_SOURCE == "schedule"'
 
@@ -255,6 +258,7 @@
 .shared:rules:update-cache:
   rules:
     - <<: *if-master-schedule-2-hourly
+    - <<: *if-security-schedule
     - <<: *if-merge-request-title-update-caches
 
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