Replaced "you" by "we" (#1451)

Sounds like accusatory, and more inclusive.

CODE_OF_CONDUCT.md

@@ -33,8 +33,8 @@ that we ask all community members to adhere to:
 -   be friendly and patient,
 -   be considerate,
 -   be kind,
--   be careful in the words that you choose,
--   when we disagree, try to understand why, and
+-   be careful in the words that we choose,
+-   when we disagree, we try to understand why, and
 -   recognize when progress has stopped, and take a step back.
 
 This list isn't exhaustive. Rather, take it in the spirit in which it’s intended