Make the latest update date at the bottom use Hijri dates

[mr-islam]

This is a non-critical date which is just there as a bonus. Using more Hijri dates is always preferable.

Text should include the word "Version Ramadan 1442" and for example in Arabic: إصدار رمضان 1442

Related to #47

[mr-islam]

Done, using the native JS handler. Really happy with how easy it was, and using months for release versioning is much better than arbitrary (at least, to the user) version numbers