Fixed link in changelog

Author: Vassil Keremidchiev

ChangeLog.md

@@ -49,7 +49,7 @@ Other enhancements:
   a method to ensure PVP compliance without having to proactively fix
   bounds issues for Stackage maintenance.
 * Expose a `save-hackage-creds` configuration option
-* MinGW bin folder now is searched for dynamic libraries. See [#3126]
+* MinGW bin folder now is searched for dynamic libraries. See [#3126](https://github.com/commercialhaskell/stack/issues/3126)
 
 Bug fixes: