Fixes security projects validator
What does this MR do?
Fixes ProjectsValidator
error https://sentry.gitlab.net/gitlab/release-tools/issues/1565644/?referrer=slack
The service was currently referencing a local variable that wasn't specified.
Related to https://gitlab.com/gitlab-org/release-tools/-/issues/426 & !970 (merged)
Edited by Mayra Cabrera