docs: add changelog

kenjis · kenjis · commit f978d71f95af · 2023-11-07T10:09:35.000+09:00
diff --git a/user_guide_src/source/changelogs/v4.5.0.rst b/user_guide_src/source/changelogs/v4.5.0.rst
@@ -226,6 +226,9 @@ Model
 Libraries
 =========
 
+- **Validation:** Added the new rule ``field_exists`` that checks the filed
+  exists in the data to be validated.
+
 Helpers and Functions
 =====================
 
