link to new location (#4836)

Author: thomasp85

CONTRIBUTING.md

@@ -6,7 +6,7 @@ quickly as possible. The guide is divided into two main pieces:
 1. Filing a bug report or feature request in an issue.
 1. Suggesting a change via a pull request.
 
-Please note that ggplot2 is released with a [Contributor Code of Conduct](CODE_OF_CONDUCT.md). By contributing to this project, 
+Please note that ggplot2 is released with a [Contributor Code of Conduct](.github/CODE_OF_CONDUCT.md). By contributing to this project, 
 you agree to abide by its terms.
 
 ## Issues

GOVERNANCE.md

@@ -21,7 +21,7 @@ Users who continue to engage with the project and its community will often find
 
 ## Contributors
 
-Contributors interact with the project on GitHub by filing new issues, improving existing issues, or submitting pull requests. Anyone can become a contributor: there is no expectation of commitment to the project, no required set of skills, and no selection process. The only obligation is to follow the [code of conduct](CODE_OF_CONDUCT.md).
+Contributors interact with the project on GitHub by filing new issues, improving existing issues, or submitting pull requests. Anyone can become a contributor: there is no expectation of commitment to the project, no required set of skills, and no selection process. The only obligation is to follow the [code of conduct](.github/CODE_OF_CONDUCT.md).
 
 Specific advice for contributing to the project can be found in
 [CONTRIBUTING.md](https://github.com/tidyverse/ggplot2/blob/master/CONTRIBUTING.md).