chore(release): Add changelog for 18.0.13

Signed-off-by: Joas Schilling <[email protected]>

CHANGELOG.md

@@ -1,6 +1,17 @@
 # Changelog
 All notable changes to this project will be documented in this file.
 
+## 18.0.13 – 2024-11-07
+### Changed
+- Update translations
+- Update dependencies
+
+### Fixed
+- fix(chat): Fix layout for guests on public conversations
+  [#13620](https://github.com/nextcloud/spreed/issues/13620)
+- fix(UI): Improve handling of sidebar on mobile view
+  [#12693](https://github.com/nextcloud/spreed/issues/12693)
+
 ## 18.0.12 – 2024-10-10
 ### Changed
 - Update translations