Reitti v2.3.1 - Hotfix for date detection via Magic Links

This patch release fixes an issue where the new “current date” logic did not run when accessing Reitti via a Magic Link.

Fixes

• Include util.js in index.html (#436 by @dgraf-gh)
  Resolves a user-reported issue where determining the current date failed when using a Magic Link.

Thanks to @sne11ius who reported this issue.

Full Changelog: v2.3.0...v2.3.1