Update version and release_notes to 5.7.4

(cherry picked from commit 2f85b11)

bodhi/__init__.py

@@ -17,7 +17,7 @@
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 """Fedora's update manager."""
 
-__version__ = "5.7.3"
+__version__ = "5.7.4"
 
 # This is a regular expression used to match username mentions in comments.
 MENTION_RE = r'(?<!\S)(@\w+)'

docs/user/release_notes.rst

@@ -4,6 +4,39 @@ Release notes
 
 .. towncrier release notes start
 
+v5.7.4
+======
+This is a bugfix release that should help with several more problems after 7.5.3 release.
+
+
+Features
+^^^^^^^^
+
+* Automatic updates consumer can now identify new packages and mark updates
+  with the appropriate type (:pr:`4324`).
+* Detect stuck updates with builds that were never been sent to pending-signing
+  and unstuck them (:issue:`4307`).
+
+Bug fixes
+^^^^^^^^^
+
+* Bodhi will now retry to get a build changelog if Koji returns empty rpm
+  headers. See also https://pagure.io/koji/issue/3178 (:issue:`4316`).
+* Fixed an issue about some bug title never fetched from Bugzilla
+  (:issue:`4317`).
+
+Contributors
+^^^^^^^^^^^^
+
+The following developers contributed to this release of Bodhi:
+
+* Adam Saleh
+* Aurélien Bompard
+* Adam Williamson
+* Lenka Segura
+* Mattia Verga
+
+
 v5.7.3
 ======
 This is a bugfix release that should help with several more problems after 7.5.2 release.