Release notes 1.32

Related: https://pagure.io/koji/issue/3621

docs/source/migrations/migrating_to_1.32.rst

@@ -0,0 +1,22 @@
+Migrating to Koji 1.32
+======================
+
+You should consider the following changes when migrating to 1.32:
+
+DB Updates
+----------
+
+There is a simple schema change adding new index.
+
+As in previous releases, we provide a migration script that updates the database.
+
+::
+
+    # psql koji koji < /usr/share/doc/koji/docs/schema-upgrade-1.31-1.32.sql
+
+
+Other changes
+-------------
+
+There are numerous other changes in 1.32 that should not have a direct impact on migration. For
+details see: :doc:`../release_notes/release_notes_1.32`