fix scroll-tech#1544

CONTRIBUTING.md

@@ -1,7 +1,5 @@
 ## Contributing
 
-[fork]: /fork
-[pr]: /compare
 [style]: https://standardjs.com/
 [code-of-conduct]: CODE_OF_CONDUCT.md
 
@@ -21,11 +19,11 @@ We'd also love PRs. If you're thinking of a large PR, we advise opening up an is
 
 ## Submitting a pull request
 
-1. [Fork][fork] and clone the repository.
+1. [Fork](https://github.com/scroll-tech/scroll/fork) and clone the repository.
 2. Create a new branch: `git checkout -b my-branch-name`.
 3. Make your change, add tests, and make sure the tests still pass.
 4. Format your code in scroll home directory: `make lint && make fmt`
-5. Push to your fork and [submit a pull request][pr].
+5. Push to your fork and [submit a pull request](https://github.com/scroll-tech/scroll/compare).
 6. Pat yourself on the back and wait for your pull request to be reviewed and merged.
 
 Here are a few things you can do that will increase the likelihood of your pull request being accepted: