doc: fix some broken links

Author: Akaricchi

doc/CONTROLLER.rst

@@ -41,7 +41,7 @@ There are a few ways to generate a custom mapping:
    but not open source.
 -  Finally, you can try to write a mapping by hand. You will probably have to
    refer to the SDL documentation. See `gamecontrollerdb.txt
-   <misc/gamecontrollerdb/gamecontrollerdb.txt>`__ for some more examples.
+   <../external/gamecontrollerdb/gamecontrollerdb.txt>`__ for some more examples.
 
 Whether you use one of the above tools, or hand-roll one yourself, the mapping
 should look something like this:

doc/README.rst

@@ -6,7 +6,7 @@ Here's a list of all the docs we have for working with Taisei.
 Gameplay & Troubleshooting
 --------------------------
 
-* `MANUAL.rst <./MANUAL.rst>`__ - the general game manual on how to play Taisei
+* `GAME.rst <./GAME.rst>`__ - the general game manual on how to play Taisei
 * `STORY.txt <./STORY.txt>`__ - the story of Taisei Project
 * `CONTROLLER.rst <./CONTROLLER.rst>`__ - how to use a controller with Taisei