mention Zulip as an option for transparent chat for open source projects

[pdurbin]

Zulip has recently come onto the "transparent chat for open source projects" scene with a public access option: https://zulip.com/help/public-access-option

Here's the blog post announcing it: https://blog.zulip.com/2022/05/05/public-access-option/

I've been playing with Zulip off and on for months (maybe a year or two?) but today I finally installed a desktop client and was impressed that you can point it at public orgs and don't even have to log in. It looks and works great. Here is the desktop app pointed at https://chat.zulip.org

Some additional thoughts on Zulip:

• https://github.com/IQSS/chat.dataverse.org/issues/22