Merge branch 'fix-error-doc-generic-packages-repository' into 'master'

Fix doc/header for "download package" with project access token

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/176701



Merged-by: Phillip Wells <pwells@gitlab.com>
Approved-by: Phillip Wells <pwells@gitlab.com>
Co-authored-by: Virgil FRADET <vfradet@jes.fr>