docs(CONTRIBUTING): add link to INTERNALS.md
@@ -16,7 +16,7 @@ When changing existing source code, you do not alter the copyright of the origin
### What To Read
-Source code and the [project outline](PROJECT_OUTLINE.md) for help navigating the codebase.
+Source code, the [project outline](PROJECT_OUTLINE.md) and [internals](INTERNALS.md).
## Write a good patch
