doc: replace node-forward link in CONTRIBUTING.md

Direct high-level discussion and questions about IP and trademark policy
to the TSC repository.

PR-URL: https://github.com/nodejs/node/pull/5227
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: Johan Bergström <bugs@bergstroem.nu>
Reviewed-By: Rod Vagg <r@va.gg>

CONTRIBUTING.md

@@ -17,7 +17,7 @@ For general help using Node.js, please file an issue at the
 
 Discussion of non-technical topics including subjects like intellectual
 property, trademark and high level project questions should move to the
-[node-forward discussions repository](https://github.com/node-forward/discussions)
+[Technical Steering Committee (TSC)](https://github.com/nodejs/TSC/issues)
 instead.
 
 ## Code Contributions