Set up release notes for 5.3

CHANGELOG.txt

@@ -1,6 +1,12 @@
 Changelog
 =========
 
+5.3 (xx.xx.xxxx) - IN DEVELOPMENT
+~~~~~~~~~~~~~~~~
+
+ * ...
+
+
 5.2 (xx.xx.xxxx) - IN DEVELOPMENT
 ~~~~~~~~~~~~~~~~
 

docs/releases/5.3.md

@@ -0,0 +1,38 @@
+# Wagtail 5.3 release notes - IN DEVELOPMENT
+
+_Unreleased_
+
+```{contents}
+---
+local:
+depth: 1
+---
+```
+
+## What's new
+
+
+### Other features
+
+ * ...
+
+### Bug fixes
+
+ * ...
+
+### Documentation
+
+ * ...
+
+### Maintenance
+
+ * ...
+
+
+## Upgrade considerations - changes affecting all projects
+
+## Upgrade considerations - deprecation of old functionality
+
+## Upgrade considerations - changes affecting Wagtail customisations
+
+## Upgrade considerations - changes to undocumented internals

docs/releases/index.rst

@@ -5,6 +5,7 @@ Release notes
    :maxdepth: 1
 
    upgrading
+   5.3
    5.2
    5.1.3
    5.1.2