Add changelog entry for v5.0-r3

Author: TamaroWalter

CHANGES.md

@@ -1,5 +1,9 @@
 CHANGELOG
 =========
+v5.0-r3 (2025-10-03)
+------------------
+- Change function call of the local support plugin
+
 v5.0-r2 (2025-09-24)
 ------------------
 - Implement changes needed to publish townsquare on moodle.org
@@ -10,4 +14,4 @@ v5.0-r1 (2025-07-31)
 - Update for Moodle 5.0
 - Update UI with new bootstrap classes, keep old-UI compatibility for older Moodle versions
 - Improve height of post letter
-- Improve language strings in sidepanel
+- Improve language strings in sidepanel