Update CONTRIBUTING.md (#151614)
Part of https://github.com/flutter/flutter/issues/150869.
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index bc15154..d1e70f7 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -101,7 +101,7 @@
are strongly recommended to go through these documents in the order
presented.
-1. [Setting up your engine development environment](./docs/engine/contributing/Setting-up-the-Engine-development-environment.md),
+1. [Setting up your engine development environment]([./docs/engine/contributing/Setting-up-the-Engine-development-environment.md](https://github.com/flutter/engine/blob/main/docs/contributing/Setting-up-the-Engine-development-environment.md)),
which describes the steps you need to configure your computer to
work on Flutter's engine. If you only want to write code for the
Flutter framework, you can skip this step. Flutter's engine mainly
