Update Code of Conduct (v2.0, https links) (mapbox#9176)

* update Code of Conduct (v2.0, https links)

* Add reporting guidelines & contact email to CoC

* Remove outdated link to open source page from CoC

* Add spacing for readibility

Co-authored-by: Anjana Sofia Vakil <anjana.vakil@mapbox.com>

Author: 2 people

CODE-OF-CONDUCT.md

@@ -1,5 +1,7 @@
 # Code of conduct
 
-Everyone is invited to participate in Mapbox’s open source projects and public discussions: we want to create a welcoming and friendly environment. Harassment of participants or other unethical and unprofessional behavior will not be tolerated in our spaces. The [Contributor Covenant](http://contributor-covenant.org) applies to all projects under the Mapbox organization and we ask that you please read [the full text](http://contributor-covenant.org/version/1/2/0/).
+Everyone is invited to participate in [Mapbox’s open source projects](https://github.com/mapbox) and public discussions: we want to create a welcoming and friendly environment. Harassment of participants or other unethical and unprofessional behavior will not be tolerated in our spaces.
 
-You can learn more about our open source philosophy on [mapbox.com](https://www.mapbox.com/about/open/).
+The [Contributor Covenant](https://contributor-covenant.org) applies to all projects under the Mapbox organization and we ask that you please read [the full text](https://www.contributor-covenant.org/version/2/0/code_of_conduct.html).
+
+Please report any instances of behavior violating this code to conduct@mapbox.com. Our team will handle any such report confidentially, and promptly review and investigate the situation and act to [enforce](https://www.contributor-covenant.org/version/2/0/code_of_conduct#enforcement) this code of conduct as needed.