docs(CONTRIBUTOR_LADDER): add links for Github Slack and meetings
Add links for Github Slack and meetings in
contributing ladder doc.
@@ -20,7 +20,7 @@ Description: A Community Participant participates in the community and contribut
* Responsibilities:
* Must follow the [CNCF Code of Conduct]
* How users can get involved with the community:
- * Participating in community discussions in GitHub, Slack, and meetings
+ * Participating in community discussions in [GitHub, Slack, and meetings](https://github.com/openservicemesh/osm#community)
* Helping other users
* Submitting bug reports
* Trying out new releases
