Update plenary

[jcklie]

Can you add the following info the industry and ethics panel?
Industry panel:
Panelists: Fei Sha, Chin-Yew Lin, Kristina Toutanova, Daniel Marcu, Joel Tetreault, João Graça
Ethics panel:
Topic: Publishing in an era of Responsible AI: How can NLP be proactive? Considerations and Implications
Panelists: Mona Diab, Emily Bender, Rosie Campbell, Allan Dafoe, Pascale Fung, Meg Mitchell, Saif Muhammad