net/rubygem-omniauth-azure-activedirectory-v2: update to 2.4.0
Required for gitlab 19.2.0
Changes: https://github.com/RIPAGlobal/omniauth-azure-activedirectory-v2/blob/master/CHANGELOG.md
(cherry picked from commit 4ebafd2c17b30190ff9194065766e642034dc2b2)