Update foyer/forcefields/xml/oplsaa.xml
Update foyer/forcefields/xml/oplsaa.xml

Co-Authored-By: Justin Gilmer <5e98d74561f0270f2c977acbfb733941dc51e391@gmail.com>
iModels/foyer,mosdef-hub/foyer,iModels/foyer,mosdef-hub/foyer