docs: Link the documentation guidelines

From the coding style.

diff --git a/docs/CODING-STYLE.md b/docs/CODING-STYLE.md
index 36b82dced069fc59b96c570970c55e43959f087a..1867bf3fc1bdf17f444a7e89367705d19e5625dc 100644 (file)
--- a/docs/CODING-STYLE.md
+++ b/docs/CODING-STYLE.md
@@ -759,6 +759,9 @@ To properly document a new class, it needs to be given its own section
 in the sections.txt, needs to be included in the `docs.xml` file, and the
 `get_type` function needs to listed in the `.types` file.
 
+For more information on the documentation style and contribution guidelines,
+please [follow the corresponding contribution guide](./reference/README.md).
+
 ### Old code
 
 New code that is being added to GTK should adhere to the style