ISTWCMS-4957: Update to simplesamlphp_custom_attributes 2.0.0
The only difference is a change to the README.
On or around 4:30pm on Tuesday the 4th of February, git.uwaterloo.ca will be restarted to apply application and security patches. This maintenance should bring GitLab to latest patch release 17.6.x.
The only difference is a change to the README.