[Halld-physics] updated DNP slides

[Sean Dobbs]

Hi all,

Thanks to everyone who gave practice talks and gave feedback on them!
Most speakers have uploaded updated slides to the DocDB, and I hope
that the rest will upload their slides by the end of the day.

You can find the updated slides at the following wiki page, marked
with (updated), for anyone who would like to give additional feedback:
https://halldweb.jlab.org/wiki-private/index.php/GlueX_DNP_2021#Review_.2F_Practice_Talk_Schedule

Cheers,
Sean