Add release note re #21444

docs/source/release/v3.13.0/framework.rst

@@ -9,4 +9,13 @@ Framework Changes
     putting new features at the top of the section, followed by
     improvements, followed by bug fixes.
 
-:ref:`Release 3.13.0 <v3.13.0>`
+
+Algorithms
+----------
+
+Improved
+########
+- :ref:`Maxent <algm-Maxent>` when outputting the results of the iterations, it no longer pads with zeroes but
+  returns as many items as iterations done for each spectrum, making the iterations easy to count.
+
+:ref:`Release 3.13.0 <v3.13.0>`
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