gi-gtk-4.0.6: ChangeLog.md

### 4.0.6

+ Relax constraint on text

### 4.0.5

+ Update to haskell-gi(-base)-0.26

### 4.0.4

+ Update to haskell-gi(-base)-0.25

### 4.0.3

+ Fix some introspection data involving GtkTreeIters.

### 4.0.2

+ Upgrade to haskell-gi-base-0.24

### 4.0.1

+ Initial release