Release apertis-update-manager version 0.2020.33

Signed-off-by: Walter Lozano <walter.lozano@collabora.com>

debian/changelog

+apertis-update-manager (0.2020.33) apertis; urgency=medium
+
+  [ Ben Hutchings ]
+  * managerd: Fix crash when static-delta contains no refs
+    aum_get_metadata_collection_refs() checks whether the commit has
+    ref-bindings before trying to duplicate them, but it unconditionally
+    tries to log them.  This results in a null pointer dereference if they
+    are missing.
+    Move the logging of references into the conditional block, and log a
+    different message if no references are found.
+    Fixes: b66b07040190 ("Use separate function for gathering refs from commit")
+    Signed-off-by: Ben Hutchings <ben.hutchings@mind.be>
+
+ -- Walter Lozano <walter.lozano@collabora.com>  Fri, 12 Jul 2024 13:00:44 -0300
+
 apertis-update-manager (0.2020.32) apertis; urgency=medium
 
   * managerd: fix ref used on successful upgrade