message: add code of conduct to the readme resources
diff: @@ -72,4 +72,5 @@ If you are coming from `react-native-sentry` which was our SDK `< 1.0` you shoul
  * [![Forum](https://img.shields.io/badge/forum-sentry-green.svg)](https://forum.sentry.io/c/sdks)
  * [![Discord](https://img.shields.io/discord/621778831602221064)](https://discord.gg/Ww9hbqr)
  * [![Stack Overflow](https://img.shields.io/badge/stack%20overflow-sentry-green.svg)](http://stackoverflow.com/questions/tagged/sentry)
  +* [![Code of Conduct](https://img.shields.io/badge/code%20of%20conduct-sentry-green.svg)](https://github.com/getsentry/.github/blob/master/CODE_OF_CONDUCT.md)
  * [![Twitter Follow](https://img.shields.io/twitter/follow/getsentry?label=getsentry&style=social)](https://twitter.com/intent/follow?screen_name=getsentry)
  