Fixes broken Code of Conduct links

Sanjeet Suhag · Sanjeet Suhag · commit 1d4159013d54 · 2020-10-06T14:20:34.000-04:00
diff --git a/CODE_OF_CONDUCT.md b/CODE_OF_CONDUCT.md
@@ -1,5 +1,5 @@
 # Code of Conduct
 
-One of Cesium's strengths is our community. Our contributors and users are pushing the 3D geospatial field to amazing new levels. We rely on an open, friendly, inclusive environment to facilitate this. As such, we follow the [Contributor Covenant](http://contributor-covenant.org/)'s [Code of Conduct](http://contributor-covenant.org/version/1/4/code-of-conduct.md) to ensure a harassment-free experience in the Cesium community. Any unacceptable behavior can be confidentially sent to the core team at hello@cesium.com.
+One of Cesium's strengths is our community. Our contributors and users are pushing the 3D geospatial field to amazing new levels. We rely on an open, friendly, inclusive environment to facilitate this. As such, we follow the [Contributor Covenant](https://www.contributor-covenant.org/)'s [Code of Conduct](https://www.contributor-covenant.org/version/2/0/code_of_conduct/) to ensure a harassment-free experience in the Cesium community. Any unacceptable behavior can be confidentially sent to the core team at hello@cesium.com.
 
 This applies to the main Cesium repo, forum, twitter, and all channels, including all repos in the [CesiumGS](https://github.com/CesiumGS) GitHub organization.
