docs: replace On with on

kenjis · kenjis · commit 5acce4d3588d · 2023-02-11T13:48:50.000+09:00
diff --git a/user_guide_src/source/general/environments.rst b/user_guide_src/source/general/environments.rst
@@ -102,7 +102,7 @@ a fresh install:
 * production.php
 * testing.php
 
-Effects On Default Framework Behavior
+Effects on Default Framework Behavior
 =====================================
 
 There are some places in the CodeIgniter system where the ``ENVIRONMENT``
