Add 5.2.1 release notes

CHANGELOG.txt

@@ -1,6 +1,12 @@
 Changelog
 =========
 
+5.2.1 (xx.xx.xxxx) - IN DEVELOPMENT
+~~~~~~~~~~~~~~~~~~
+
+* Fix: Add a fallback background for the editing preview iframe for sites without a background (Ian Price)
+
+
 5.2 LTS (01.11.2023)
 ~~~~~~~~~~~~~~~~~~~~
 

docs/releases/5.2.1.md

@@ -0,0 +1,17 @@
+# Wagtail 5.2.1 release notes - IN DEVELOPMENT
+
+_Unreleased_
+
+```{contents}
+---
+local:
+depth: 1
+---
+```
+
+## What's new
+
+
+### Bug fixes
+
+ * Add a fallback background for the editing preview iframe for sites without a background (Ian Price)

docs/releases/index.rst

@@ -5,6 +5,7 @@ Release notes
    :maxdepth: 1
 
    upgrading
+   5.2.1
    5.2
    5.1.3
    5.1.2