Fix broken links in CONTRIBUTING.md (#363)

Author: whiteSHADOW1234

CONTRIBUTING.md

@@ -3,13 +3,13 @@
 [fork]: https://github.com/github/forgoodfirstissue/fork
 [pr]: https://github.com/github/forgoodfirstissue/compare
 [style]: https://github.com/github/forgoodfirstissue/blob/main/.eslintrc.json
-[code-of-conduct]: CODE_OF_CONDUCT.md
+[code-of-conduct]: https://github.com/github/.github/blob/main/CODE_OF_CONDUCT.md
 
 Hi there! We're thrilled that you'd like to contribute to this project. Your help is essential for keeping it great.
 
-Contributions to this project are [released](https://help.github.com/articles/github-terms-of-service/#6-contributions-under-repository-license) to the public under the [project's open source license](LICENSE.md).
+Contributions to this project are [released](https://help.github.com/articles/github-terms-of-service/#6-contributions-under-repository-license) to the public under the [project's open source license](LICENSE).
 
-Please note that this project is released with a [Contributor Code of Conduct](CODE_OF_CONDUCT.md). By participating in this project you agree to abide by its terms.
+Please note that this project is released with a [Contributor Code of Conduct](https://github.com/github/.github/blob/main/CODE_OF_CONDUCT.md). By participating in this project you agree to abide by its terms.
 
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