More explicit link to xkcd in CoC (#38833)
cc @gspencergoog
diff --git a/CODE_OF_CONDUCT.md b/CODE_OF_CONDUCT.md
index 2117a60..02af22c 100644
--- a/CODE_OF_CONDUCT.md
+++ b/CODE_OF_CONDUCT.md
@@ -43,4 +43,6 @@
the first place you looked. That way, the next person will be brought
up to speed even quicker.
-[](https://xkcd.com/1053/)
+
+
+Source: _[xkcd, May 2012](https://xkcd.com/1053/)_