Update changelog

Author: dihm

docs/source/changelog.rst

@@ -22,6 +22,7 @@ Bug Fixes
 - Fix `Cell.kappa` and `Cell.eta` to properly introspect `q` when first edge on the graph
   happens to not be dipole-allowed.
 - Fix `draw_diagram` to handle complex time-dependent functions correctly.
+- Fix `cyrk_solve` flat diffEq backend to properly handle EOM stacks.
 
 Deprecations
 ++++++++++++