Update docs/releasehistory.rst
Update docs/releasehistory.rst

Co-authored-by: Matt Thompson <7e150454a64ed046b7f53607a2c5a2949ec8f973@gmail.com>
open-forcefield-group/openforcefield,open-forcefield-group/openforcefield,openforcefield/openff-toolkit,open-forcefield-group/openforcefield,openforcefield/openff-toolkit