Update README.md (#633)

Fix: updated year

Author: dutkulang

README.md

@@ -69,6 +69,6 @@ In this course, you will:
 
 Get help: [Post in our discussion board](https://github.com/orgs/skills/discussions/categories/introduction-to-github) • [Review the GitHub status page](https://www.githubstatus.com/)
 
-© 2023 GitHub • [Code of Conduct](https://www.contributor-covenant.org/version/2/1/code_of_conduct/code_of_conduct.md) • [MIT License](https://gh.io/mit)
+© 2024 GitHub • [Code of Conduct](https://www.contributor-covenant.org/version/2/1/code_of_conduct/code_of_conduct.md) • [MIT License](https://gh.io/mit)
 
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