www/gitlab-pages: update to 1.56.0
Required for gitlab-ce 14.9
Changelog:
https://gitlab.com/gitlab-org/gitlab-pages/-/blob/master/CHANGELOG.md
Added (3 changes)
feat: allow auth http.Client timeout to be configurable by @Osmanilge (merge request)
feat: make server shutdown timeout configurable by @HuseyinEmreAksoy (merge request)
Add security-harness script (merge request)