Fix readme.md link in contributing.md (#42847)

stephentoub · web-flow · commit 76daaf5b839d · 2020-01-31T07:04:27.000-08:00
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
@@ -1,4 +1,4 @@
 THIS REPO IS ARCHIVED AND DOES NOT ACCEPT PULL REQUESTS.
 
 Active development has moved to https://github.com/dotnet/runtime. We welcome
- you to visit us there. For details, please see [README.md].
+ you to visit us there. For details, please see [README.md](README.md).
