Update CONTRIBUTING.md (#51728)

* Update CONTRIBUTING.md

Mention the Issue Summary Comment for contributors to look for when trying to find an issue to contribute to

* Update CONTRIBUTING.md

Co-authored-by: Dan Moseley <danmose@microsoft.com>

* Update CONTRIBUTING.md

Co-authored-by: Arvin Kahbazi <A.Kahbazi@gmail.com>
---------

Co-authored-by: Dan Moseley <danmose@microsoft.com>
Co-authored-by: Arvin Kahbazi <A.Kahbazi@gmail.com>

Author: 3 people

CONTRIBUTING.md

@@ -42,7 +42,7 @@ To help you be successful we've put together a few simple rules to follow when y
 
   Over the years we've seen many PRs targeting areas of the framework, which we didn't plan to expand further at the time.
   In all these cases we had to say `no` to those PRs and close them. That, obviously, is not a great outcome for us. And it's especially bad for the contributor, as they've spent a lot of effort preparing the change.
-  To resolve this problem, we've decided to separate a bucket of issues, which would be great candidates for community members to contribute to. We mark these issues with the `help wanted` label. You can find all these issues at [https://aka.ms/aspnet/helpwanted](https://aka.ms/aspnet/helpwanted).
+  To resolve this problem, we've decided to separate a bucket of issues, which would be great candidates for community members to contribute to. We mark these issues with the `help wanted` label. You can find all these issues at [https://aka.ms/aspnet/helpwanted](https://aka.ms/aspnet/helpwanted). When you choose an issue you'd like to work on, you'll see that some include a comment from our team that follows the [Issue Summary Template](/docs/HelpWantedIssueSummaryCommentTemplate.md). That comment is meant to make it much simpler for you to both understand what the problem is as well as provide references and hints about how to approach it.
 
 Within that set, we have additionally marked issues that are good candidates for first-time contributors. Those do not require too much familiarity with the framework and are more novice-friendly. Those are marked with the `good first issue` label. The full list of such issues can be found at [https://aka.ms/aspnet/goodfirstissues](https://aka.ms/aspnet/goodfirstissues).