e.g. in https://github.com/flutter/flutter/blob/main/engine/src/flutter/shell/platform/android/test/README.md?plain=1#L30 https://github.com/flutter/flutter/wiki/Compiling-the-engine should be replaced by https://github.com/flutter/flutter/blob/main/docs/engine/contributing/Compiling-the-engine.md

This is not always straightforward, some links are constructed and others link to specific anchors