Update link to emoji key reference in README

Author: MuhammadNiazAli

README.md

@@ -41,7 +41,7 @@ See the [contributing docs](https://allcontributors.org/project/contribute) for
 
 ## Contributors ✨
 
-Thanks go to these wonderful people ([emoji key](https://allcontributors.org/emoji-key)):
+Thanks go to these wonderful people ([emoji key](https://allcontributors.org/reference/emoji-key)):
 
 <!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
 <!-- prettier-ignore-start -->