fix requires (#9428)

Author: rosieyohannan

jekyll/_cci2/how-to-override-config.adoc

@@ -217,9 +217,11 @@ workflows:
       - build
       - test:
           override-with: team-config/custom-test
-          requires: build
+          requires:
+            - build
       - security-scan:
-          requires: build
+          requires:
+            - build
       - deploy:
           requires:
             - test