URLs are rendered incorrectly due to a missing protocol scheme in some email clients

Some email clients (e.g., Outlook Web and Outlook on Android) incorrectly render URLs in mails sent by the platform due to a missing scheme (http or https).

The problem is that the accessURL variable in https://gitlab.software.geant.org/nmaas/nmaas-populate/-/blob/master/init/data/mails/passwordReset.json?ref_type=heads#L14 is in a FQDN format (example.com), but it should be in a format such as https://example.com.