manually add absolute settings news item to changelog (#1821)

* manually add absolute settings news item to changelog

* add link

Author: atravitz

docs/CHANGELOG.rst

@@ -14,6 +14,7 @@ v1.8.0
 * Added experimental features ``openfe gather-septop`` and ``openfe gather-abfe``, which are analogous to ``openfe gather`` and allow for gathering results generated by the Separated Topologies and Absolute Binding Free Energy protocols, respectively.  These commands are experimental and are liable to be changed in a future release.
 * Emit a clarifying log message when a user gets a warning from JAX (`PR #1585 <https://github.com/OpenFreeEnergy/openfe/pull/1585>`_, fixes `Issue #1499 <https://github.com/OpenFreeEnergy/openfe/issues/1499>`_).
 * Disable JAX acceleration by default, see https://docs.openfree.energy/en/latest/guide/troubleshooting.html#pymbar-disable-jax for more information (`PR #1694 <https://github.com/OpenFreeEnergy/openfe/pull/1692>`_).
+* New options have been added to the ``AlchemicalSettings`` of the ``SepTopProtocol``, ``AbsoluteSolvationProtocol`` and ``AbsoluteBindingProtocol``. Notably, these options allow users to control the softcore parameters as well as the use of long range dispersion corrections (`PR #1742 <https://github.com/OpenFreeEnergy/openfe/pull/1742>`_).
 
 **Changed:**