#1320 update CHANGELOG

Author: brosaplanella

CHANGELOG.md

@@ -19,6 +19,7 @@
 
 ## Bug fixes
 
+-   Fixed a bug in `CasadiSolver` safe mode which crashed when there were extrapolation events but no termination events ([#1321](https://github.com/pybamm-team/PyBaMM/pull/1321))
 -   When an `Interpolant` is extrapolated an error is raised for `CasadiSolver` (and a warning is raised for the other solvers) ([#1315](https://github.com/pybamm-team/PyBaMM/pull/1315))
 -   Fixed `Simulation` and `model.new_copy` to fix a bug where changes to the model were overwritten ([#1278](https://github.com/pybamm-team/PyBaMM/pull/1278))