Remove known issue and fix issue number for another
* [#428](https://github.com/FuelLabs/sway/issues/428): Arrays are currently immutable which means that changing elements of an array once initialized is not yet possible.
-* [#1188](https://github.com/FuelLabs/sway/issues/1188): Mutable function arguments are not yet allowed except for `self`.
-
-* [#1796](https://github.com/FuelLabs/sway/issues/1796): It is not yet allowed to use `StorageMap<K, V>` as a component of a complex type such as a struct or an enum.
+* [#1796](https://github.com/FuelLabs/sway/issues/2465): It is not yet allowed to use `StorageMap<K, V>` as a component of a complex type such as a struct or an enum.
## General
