Correct version

matrix.json

@@ -1,6 +1,6 @@
 {
     "bake-target": [ "slim", "alpine" ],
     "flask": [ "3.1.0", "3.0.3", "3.0.2", "3.0.1", "3.0.0" ],
-    "gunicorn": [ "22.0.0", "21.2.0", "21.1.0", "21.0.1"],
+    "gunicorn": [ "23.0.0", "22.0.0", "21.2.0", "21.1.0"],
     "gevent": [ "24.11.1", "24.10.3", "24.10.2", "24.10.1" ]
 }