Add release notes for 9.6

Author: krassowski

docs/source/whatsnew/version9.rst

@@ -2,6 +2,29 @@
  9.x Series
 ============
 
+.. _version 9.6:
+
+IPython 9.6
+===========
+
+This version brings improvements to tab completion, ``%notebook`` magic, module ignoring functionality to debugger.
+
+- :ghpull:`14973` Add module ignoring functionality to debugger
+- :ghpull:`14982` Extract code from line magics for attribute completion
+- :ghpull:`14998` Fix matplotlib plots displaying in wrong cells during ``%notebook`` export
+- :ghpull:`14996` Respect ``DisplayFormatter.active_types`` trait configuration
+- :ghpull:`15001` Fix ``%notebook`` magic creating multiple display_data outputs for single widgets
+- :ghpull:`14997` Make ``%notebook`` magic notarise exported notebooks (mark as trusted)
+- :ghpull:`14993` Type-guided partial evaluation for completion of uninitialized variables
+- :ghpull:`14978` deduperreload: patch NULL for empty closure rather than None
+- :ghpull:`14994` Bump minimum version (spec-0) and whitespace update
+
+The ``%notebook`` magic can now reliably export plots generated by ``matplotlib``, whether with the default ``inline`` or the interactive ``ipympl`` backend.
+For the plots to display when using the ``inline`` backend the ``c.DisplayFormatter.active_types`` needs to include ``image/png`` (or another image media type, depending on the backend configuration).
+
+Tab completion now works on multi-line buffers with unevaluated code even when jedi is disabled.
+Additionally, completion works when writing code as an argument to ``%timeit`` and ``%debug``.
+
 .. _version 9.5:
 
 IPython 9.5