Rails route update for DAST Profile library

With copy improvements related to DAST Profile library, we need to update the route as well to comply with the naming.

• dast_scans > profile_library

Proposal

Current Route

http://gitlab.com/flightjs/Flight/-/security/configuration/dast_scans#site-profiles

Proposed

http://gitlab.com/flightjs/Flight/-/security/configuration/profile_library#site-profiles