Release notes 1.26

Fixes: https://pagure.io/koji/issue/2983

docs/source/migrations/migrating_to_1.26.rst

@@ -0,0 +1,27 @@
+Migrating to Koji 1.26
+======================
+
+You should consider the following changes when migrating to 1.26:
+
+DB Updates
+----------
+
+This release includes one schema change.
+
+Channels now can have description and can be enabled/disabled. (Issues `#1711
+<https://pagure.io/koji/issue/1711>`_, `#1849 <https://pagure.io/koji/issue/1849>`_
+`#1851 <https://pagure.io/koji/issue/1851>`_)
+
+
+As in previous releases, we provide a migration script that updates the database.
+
+::
+
+    # psql koji koji < /usr/share/doc/koji/docs/schema-upgrade-1.25-1.26.sql
+
+
+Other changes
+-------------
+
+There are numerous other changes in 1.26 that should not have a direct impact on migration. For
+details see: :doc:`../release_notes/release_notes_1.26`

docs/source/migrations/migrations.rst

@@ -5,6 +5,7 @@ Migrations
 .. toctree::
     :maxdepth: 1
 
+    migrating_to_1.26
     migrating_to_1.25
     migrating_to_1.24
     migrating_to_1.23