Merge pull request #7 from JuliaMolSim/update_mainpage

update landing page: remove JC22 callout, update for Slack channel

Author: mfherbst

index.md

@@ -5,10 +5,6 @@
 Your friendly organisation about molecular simulations in Julia.
 We're currently working on setting up this website. You can also check us out on [GitHub](https://github.com/JuliaMolSim)!
 
-@@colbox-blue
-We're organizing a minisymposium at JuliaCon 2022. It will take place on July 22 from 1400-1700 UTC, and you can still participate by giving a "mini-pitch" – see [agenda page](/juliacon22) for details
-@@
-
 ## Projects
 Feel free to have a look at some of our projects:
 - [ACE.jl](https://github.com/ACEsuit/ACE.jl): Atomic cluster expansion in Julia
@@ -18,9 +14,10 @@ Feel free to have a look at some of our projects:
 - [JuLIP.jl](https://github.com/JuliaMolSim/JuLIP.jl): Julia Library for Interatomic Potentials
 - [Libxc.jl](https://github.com/JuliaMolSim/Libxc.jl): Julia bindings to the libxc library for exchange-correlation functionals
 
-## Zulip chat \label{slack}
-[zulip-url]: https://juliamolsim.zulipchat.com/register/
-Get involved in ongoing conversations by joining our [Zulip chat][zulip-url]!
+## Slack channel \label{slack}
+[slack-url]: https://julialang.org/slack/
+
+Get involved in ongoing conversations by joining our #juliamolsim channel on the [Julia Slack][slack-url]!
 
 ## Virtual meetings
 - [Birds of Feather at JuliaCon 2021](/juliacon21)