Fix Uzbek converter

Improve the Latin to Cyrillic conversion of "e" per https://meta.wikimedia.org/w/index.php?title=User_talk:SPQRobin&oldid=7720901#Request

The code of this change is inspired on LanguageKk.php

As far as I tested, it works as intended

Change-Id: I20f293c8d1f753af7b5344543ec2ce459edcba0c
Merge "Fix Uzbek converter"