go: Update github.com/ProtonMail/go-crypto digest to 7e9e039

See merge request https://gitlab.com/gitlab-org/gitaly/-/merge_requests/5947



Merged-by: Sami Hiltunen <shiltunen@gitlab.com>
Approved-by: Quang-Minh Nguyen <qmnguyen@gitlab.com>
Co-authored-by: GitLab Renovate Bot <gitlab-bot@gitlab.com>