docs: add changelog v4.5.0

kenjis · kenjis · commit 78e041f399e5 · 2023-09-11T16:50:26.000+09:00
diff --git a/user_guide_src/source/changelogs/v4.5.0.rst b/user_guide_src/source/changelogs/v4.5.0.rst
@@ -12,6 +12,7 @@ Release Date: Unreleased
 Highlights
 **********
 
+- Update minimal PHP requirement to 8.0.
 - TBD
 
 BREAKING
