fix CEPC ref to Code of Conduct (#133)

use Code of Conduct URL and link text instead of prior (older wording) CEPC

index.html

@@ -84,7 +84,7 @@
 according to open processes
 (for example, the <a href="https://www.w3.org/Consortium/Process/">W3C process</a>),
 and in inclusive environments adhering to codes of conduct
-(such as the W3C <a href="https://www.w3.org/Consortium/cepc/">Code of Ethics and Professional Conduct</a>).
+(such as the W3C <a href="https://www.w3.org/policies/code-of-conduct/">Code of Conduct</a>).
 
 These are often cited as some of the strengths of the web.
 Despite this, in the 30 years since the development of the web began,