docs: add explanation

kenjis · kenjis · commit 8b37b839b3fc · 2024-04-21T10:51:05.000+09:00
diff --git a/user_guide_src/source/installation/upgrade_responses.rst b/user_guide_src/source/installation/upgrade_responses.rst
@@ -12,7 +12,8 @@ Documentations
 
 What has been changed
 =====================
-- The methods have been renamed
+- The Output class has been changed to the Response class.
+- The methods have been renamed.
 
 Upgrade Guide
 =============
