Improve test for slimming

Change-Id: If5cddb990e34bb09ec90cd14eed0c8dc05ad81f0
diff --git a/Changes b/Changes
index 00165a7..b229ee2 100644
--- a/Changes
+++ b/Changes
@@ -1,3 +1,7 @@
+0.56 2024-08-23
+        - Improve slim test for plugin support
+          (korapxml2...; diewald)
+
 0.55 2024-07-03
         - Removed deprecated doc_link_to helper. (diewald)
         - Removed deprecated doc_ext_link_to helper. (diewald)