Update install.txt

Author: sebp

source/install.txt

@@ -8,8 +8,8 @@ that enables developers to access GObject-based libraries such as GTK+
 within Python.
 It exclusively supports GTK+ version 3 or later.
 
-For full IDE support (including autocomplete) you will also need typing stubs available
-by installing the package `PyGObject-stubs`_.
+For full IDE support (including autocomplete) you will also need the type stubs
+provided by the `PyGObject-stubs`_ package.
 
 Dependencies
 ------------