Fix code of conduct link.

Summary: Thanks cmarkle for noticing in facebookincubator/fizz#5

Reviewed By: dark

Differential Revision: D9195501

fbshipit-source-id: bdbe1588cdcd353d60fcaab14a4fac8bd2256355

Author: knekritz

CODE_OF_CONDUCT.md

@@ -1,3 +1,5 @@
 # Code of Conduct
 
-Facebook has adopted a Code of Conduct that we expect project participants to adhere to. Please [read the full text](https://code.facebook.com/pages/876921332402685/open-source-code-of-conduct) so that you can understand what actions will and will not be tolerated.
+Facebook has adopted a Code of Conduct that we expect project participants to
+adhere to. Please [read the full text](https://code.facebook.com/codeofconduct)
+so that you can understand what actions will and will not be tolerated.

CONTRIBUTING.md

@@ -18,7 +18,7 @@ outlined on that page and do not file a public issue.
 
 ## Code of Conduct
 
-Facebook has adopted a Code of Conduct that we expect project participants to adhere to. Please [read the full text](https://code.facebook.com/pages/876921332402685/open-source-code-of-conduct) so that you can understand what actions will and will not be tolerated.
+Facebook has adopted a Code of Conduct that we expect project participants to adhere to. Please [read the full text](https://code.facebook.com/codeofconduct) so that you can understand what actions will and will not be tolerated.
 
 ## License
 By contributing to Haxl, you agree that your contributions will be licensed