Update CODE_OF_CONDUCT.md

Author: hknokh

CODE_OF_CONDUCT.md

@@ -102,4 +102,4 @@ This Code of Conduct is licensed under the [Creative Commons Attribution 3.0 Lic
 [golang-coc]: https://golang.org/conduct
 [cncf-coc]: https://github.com/cncf/foundation/blob/master/code-of-conduct.md
 [microsoft-coc]: https://opensource.microsoft.com/codeofconduct/
-[cc-by-3-us]: https://creativecommons.org/licenses/by/3.0/us/
+[cc-by-3-us]: https://creativecommons.org/licenses/by/3.0/us/