docs: Add release notes for v5.0.9

DIRACGrid CI · DIRACGrid CI · commit d898a58a09da · 2023-08-02T13:22:58.000Z
diff --git a/release.notes b/release.notes
@@ -1,3 +1,8 @@
+[v5.0.9]
+
+FIX: (#742) Align the parameter names between python and js for the FileCatalogHandler
+NEW: (#739) Re-add Theme setting
+
 [v5.0.8]
 
 
