Update to version 91.0.5 (mozilla-mobile#10663)

Set version to 91.0.4.

Set version to 90.0.13.

Set version to 91.0.3.

Set version to 91.0.2.

Set version to 91.0.1.

Fix Gecko.kt link in changelog

version.txt: Set version to 90.0.12.

Set version to 90.0.11.

Set version to 90.0.10.