Fix typo in GitHub for contribution guidelines

Author: antcs

docs/content/en/docs/contribution-guidelines/_index.md

@@ -56,4 +56,4 @@ in the top right hand corner of the page.
 
 * [Docsy user guide](https://www.docsy.dev/docs/): All about Docsy, including how it manages navigation, look and feel, and multi-language support.
 * [Hugo documentation](https://gohugo.io/documentation/): Comprehensive reference for Hugo.
-* [Github Hello World!](https://guides.github.com/activities/hello-world/): A basic introduction to GitHub concepts and workflow.
+* [GitHub Hello World!](https://guides.github.com/activities/hello-world/): A basic introduction to GitHub concepts and workflow.