Update "CC Me On Comments I Write" in docs

This string was edited to "Every comment" in both UIs a year ago in
I59ac79eb01a503c5a128c579c62eb8275293f209.

Bug: Issue 7090
Change-Id: I0659bc5fb4ed3adca251275591d1d80d1c5eb880

Documentation/intro-user.txt

diff --git a/Documentation/intro-user.txt b/Documentation/intro-user.txt
index 056cf43..004d5ca 100644
--- a/Documentation/intro-user.txt
+++ b/Documentation/intro-user.txt
@@ -680,7 +680,7 @@
 +
 Email notifications are enabled.
 +
-** [[cc-me]]`CC Me On Comments I Write`:
+** [[cc-me]]`Every comment`:
 +
 Email notifications are enabled and you get notified by email as CC
 on comments that you write yourself.