Update README.md
Add licensing of issue comment text
@@ -25,6 +25,7 @@ Simon Cozens prepared a [template git repo](https://github.com/googlefonts/Unifi
## License
Font Bakery is available under the Apache 2.0 license.
+All comments on the issue tracker will be treated as also licensed under this license such that they can be incorporated into the project code.
## Install
