Merge branch '371972-security-compliance-sentence-case' into 'master'

Updated Security Compliance SideNav text to sentence case

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/96450



Merged-by: Mark Lapierre <mlapierre@gitlab.com>
Approved-by: Eduardo Sanz García <esanz-garcia@gitlab.com>
Approved-by: Derek Ferguson <dferguson@gitlab.com>
Approved-by: Huzaifa Iftikhar <hiftikhar@gitlab.com>
Approved-by: Evan Read <eread@gitlab.com>
Reviewed-by: Evan Read <eread@gitlab.com>
Reviewed-by: Eduardo Sanz García <esanz-garcia@gitlab.com>
Co-authored-by: Parkourkarthik <parkourkarthik@gmail.com>