Update CONTRIBUTING.md

CONTRIBUTING.md

@@ -1,19 +1 @@
-# Contributing to zopefoundation projects
-
-The projects under the zopefoundation GitHub organization are open source and
-welcome contributions in different forms:
-
-* bug reports
-* code improvements and bug fixes
-* documentation improvements
-* pull request reviews
-
-For any changes in the repository besides trivial typo fixes you are required
-to sign the contributor agreement. See
-https://www.zope.dev/developer/becoming-a-committer.html for details.
-
-Please visit our [Developer
-Guidelines](https://www.zope.dev/developer/guidelines.html) if you'd like to
-contribute code changes and our [guidelines for reporting
-bugs](https://www.zope.dev/developer/reporting-bugs.html) if you want to file a
-bug report.
+Please see [Developer Guidelines](https://docs.plone.org/develop/coredev/docs/guidelines.html)