Link agenda of the 2020 summit on the presentations page

This allows people to find the presentations and notes.

Signed-off-by: Edwin Kempin <ekempin@google.com>
Change-Id: I2435409b8f35cb1fb5ab458c01ee5ef357726e2e
diff --git a/pages/site/community/presentations.md b/pages/site/community/presentations.md
index 21c32e2..7bcd97b 100644
--- a/pages/site/community/presentations.md
+++ b/pages/site/community/presentations.md
@@ -29,6 +29,18 @@
 
 ---
 
+**[2020-11-20] Virtual Contributor Summit 2020**
+
+```
+  The Gerrit community had a virtual 2-days event with various talks and
+  discussions. The presentation slides and notes are available from the
+  agenda [1].
+```
+
+[1] <a href="https://docs.google.com/document/d/1WauJfNxracjBK3PxuVnwNIppESGMBtZwxMYjxxeDN6M">Agenda of the Virtual Contributor Summit 2020</a>
+
+---
+
 **[2020-08-26] End-to-end tests**
 
 ```