Update CONTRIBUTING.md

Replace WICG with W3C

CONTRIBUTING.md

@@ -1,11 +1,10 @@
-# Web Platform Incubator Community Group
-
-This repository is being used for work in the Web Platform Incubator Community Group, governed by the [W3C Community License
-Agreement (CLA)](http://www.w3.org/community/about/agreements/cla/). To contribute, you must join
-the CG.
+Contributions to this repository are intended to become part of Recommendation-track documents governed by the
+[W3C Patent Policy](https://www.w3.org/Consortium/Patent-Policy/) and
+[Software and Document License](https://www.w3.org/Consortium/Legal/copyright-software). To make substantive contributions to specifications, you must either participate
+in the relevant W3C Working Group or make a non-member patent licensing commitment.
 
 If you are not the sole contributor to a contribution (pull request), please identify all
-contributors in the pull request's body or in subsequent comments.
+contributors in the pull request comment.
 
 To add a contributor (other than yourself, that's automatic), mark them one per line as follows:
 
@@ -24,50 +23,4 @@ feature, you can remove yourself with the above syntax.
 
 # Tests
 
-For normative changes, a corresponding
-[web-platform-tests](https://github.com/web-platform-tests/wpt) PR is highly appreciated. Typically,
-both PRs will be merged at the same time. Note that a test change that contradicts the spec should
-not be merged before the corresponding spec change. If testing is not practical, please explain why
-and if appropriate [file an issue](https://github.com/web-platform-tests/wpt/issues/new) to follow
-up later. Add the `type:untestable` or `type:missing-coverage` label as appropriate.
-
-# Spec Changes
-
-If you would like to propose a spec change, please send a PR that changes
-[spec/index.bs][] *and* regenerate [dist/spec/index.html][].
-
-Here's a workflow to get you started:
-
-1.  Fork github.com/WICG/webappsec-trusted-types
-1.  `git clone` your fork and `cd trusted-types`
-1.  `npm install` to get everything set up.
-1.  Run `git checkout -b your-branch-name` to setup a branch to hold your patch.
-1.  Optionally, [install bikeshed](https://tabatkins.github.io/bikeshed/#installing)
-1.  Run `node_modules/.bin/gulp spec.watch` which will regnerate `dist/spec/index.html`
-    every time you modify [spec/index.bs][].
-1.  Open a browser to your local [dist/spec/index.html][].
-1.  Until you're happy, make edits to your local [spec/index.bs][].
-    To help, you might refer to:
-    *   The [bikeshed docs](https://tabatkins.github.io/bikeshed/)
-    *   The [bikeshed doc source](https://github.com/tabatkins/bikeshed/blob/master/docs/index.bs)
-        which shows bikeshed in practice.
-    *   The source for the other specifications like
-        [CSP3](https://github.com/w3c/webappsec-csp/blob/master/index.src.html)
-1.  Be aware of [issue 112](https://github.com/WICG/webappsec-trusted-types/issues/112) if you're
-    having trouble with the watcher.
-1.  Maybe locally enable
-    [`Complain About: broken-links yes`](https://github.com/WICG/webappsec-trusted-types/blob/9445a47f720f255d066621ba6975228e558453f5/spec/index.bs#L18)
-    and double check that there are no broken links.
-    Broken-link checking is slooow during development.
-1.  Commit and push your branch to your fork and send us a PR.
-1.  Check the PR to see if bots need you to sign any contributor agreements.
-
-Once your PR is merged, it'll be available at
-https://wicg.github.io/trusted-types/dist/spec/
-but if you want a shareable link to your PR, try filling in the blanks:
-
-> <tt>https\://raw.githack.com/<b>\<YOUR-GITHUB-HANDLE\></b>/trusted-types/<b>\<YOUR-BRANCH-NAME\></b>/dist/spec/index.html</tt>
-
-
-[spec/index.bs]: https://github.com/WICG/webappsec-trusted-types/blob/master/spec/index.bs
-[dist/spec/index.html]: https://github.com/WICG/webappsec-trusted-types/blob/master/dist/spec/index.html
+See [CONTRIBUTING.md](https://github.com/w3c/webappsec/blob/master/CONTRIBUTING.md).