Focus social media (#485)

Author: jarrodmillman

assets/icons/mastodon.svg

@@ -38,12 +38,17 @@ params:
     logo: logo.svg
     socialmediatitle: ""
     socialmedia:
-      - link: https://scientific-python.org/
-        icon: scientific-python
-      - link: https://discuss.scientific-python.org/
-        icon: discourse
       - link: https://github.com/scientific-python/
         icon: github
+      - link: https://www.youtube.com/c/ScientificPython-org
+        icon: youtube
+      - link: https://fosstodon.org/scientific_python
+        icon: mastodon
+      - link: https://discuss.scientific-python.org
+        icon: discourse
+      - link: https://discord.com/invite/vur45CbwMz
+        icon: discord
+
     quicklinks:
       column1:
         title: ""