Pipeline Security - update metric yaml files

When Pipeline Security moved from sectionci to sectionsec, some of our metrics are still aligned to CI rather than Sec. We need to make sure our team's metrics reflect the change to Sec. One example metric needing to be updated is: https://metrics.gitlab.com/keys/service-ping/?q=redis_hll_counters.ci_secrets_management.i_ci_secrets_management_vault_build_created_monthly.