Update twitter layout to include multiple speakers

[drewbrew]

Expected behavior:
On /speaking/twitter/, talks with multiple speakers should list all speakers by name and twitter (if provided).

Example: Full text search with Django and Postgres by Jason Judkins (no twitter) and Colin Copeland (@copelco) should list both names

Actual behavior:
It only lists Jason's name and Colin's Twitter handle

Steps to repeat behavior:

• https://2022.djangocon.us/speaking/twitter/
• scroll to the very last talk