docs: change TOC depth to 3

kenjis · kenjis · commit a8a53e70cd97 · 2023-07-09T06:41:25.000+09:00
diff --git a/user_guide_src/source/models/model.rst b/user_guide_src/source/models/model.rst
@@ -4,7 +4,7 @@ Using CodeIgniter's Model
 
 .. contents::
     :local:
-    :depth: 2
+    :depth: 3
 
 Models
 ******
