Update CONTRIBUTING.md

Add link to Trusted Committers

Author: rrrutledge

CONTRIBUTING.md

@@ -23,7 +23,7 @@ This book uses the [Goal-Question-Metric] approach to documenting InnerSource me
 The full graph of relationships is visible in this [graph].
 
 Add in your scenarios by copying this [goal template], [question template], and/or [metric template], filling them out, and submitting them in pull request.
-After successful merge, a Trusted Committer will manually[^1] add those to the [graph].
+After successful merge, a [Trusted Committer](https://github.com/orgs/InnerSourceCommons/teams/ispo-working-group-trusted-committers) will manually[^1] add those to the [graph].
 If interested, feel free to [edit the MermaidJS source] of the graph on your own!
 
 By adding in your scenarios to the graph, you will be able to see how others approach and interact with them.