Merge branch 'pw-sentence-case-vuln-report' into 'master'

Sentence case 'vulnerability report' in docs

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/183871



Merged-by: Russell Dickenson <rdickenson@gitlab.com>
Approved-by: Russell Dickenson <rdickenson@gitlab.com>
Co-authored-by: phillipwells <pwells@gitlab.com>