docs: prepare release notes for v5.3.0

docs/releases/5.2.1.md → docs/releases/5.3.0.md

-# Grouprise 5.2.1
+# Grouprise 5.3.0
 
-Release date: *???*
+Release date: *2022-12-24*
 
 
 ## Administration
@@ -8,6 +8,8 @@ Release date: *???*
 * new setting [`data_path`](../administration/configuration/options.html#data-path):
   the directory containing all locally stored data can be specified explicitly now
 * configuration directories are now processed recursively (previously: only files in the first level were processed)
+* direct file access (below `/stadt/media/`) is now handled by Django redirects in order to enforce
+  proper permission and ownership handling
 
 
 ## Contact form (captcha)

docs/releases/index.rst

@@ -10,12 +10,12 @@ Release Notes
 .. toctree::
    :hidden:
 
-   5.2.1
 
 
 .. toctree::
    :maxdepth: 1
 
+   5.3.0
    5.2.0
    5.1.1
    5.1.0