Bump version to 3.38.2

For the MS Windows version.

README.md

 gedit - The GNOME text editor
 =============================
 
-This is version 3.38.1 of gedit.
+This is version 3.38.2 of gedit.
 
 gedit is the text editor of the GNOME desktop environment.
 

meson.build

 project(
   'gedit', 'c',
-  version: '3.38.1',
+  version: '3.38.2',
   meson_version: '>= 0.53'
 )