define CC at top of Join the CC Developer Community. also deprioritize twitter and mailing lists

Author: TimidRobot

content/community/contents.lr

@@ -4,11 +4,10 @@ _template: page-with-toc.html
 ---
 title: Join the CC Developer Community
 ---
-description: Join our Slack or mailing list communities to meet other
-developers interested in Creative Commons, get feedback on your projects, and
-talk with CC's full-time engineering staff. You can also keep up with us on the
-<a href="/blog">CC Open Source Blog</a> or via <a
-href="https://twitter.com/cc_opensource">Twitter</a>.
+description: Join our Slack to meet other developers interested in Creative
+Commons (CC), get feedback on your projects, and talk with CC's full-time
+Technology team members. You can also keep up with us on the <a href="/blog">CC
+Open Source Blog</a>.
 ---
 body: