docs(README): add --org flag to travis encrypt

README.md

@@ -100,7 +100,7 @@ CI is not about testing per se – it's about _continuously integrating_ your ch
 2. Un-comment the bottom part of `.travis.yml` (the `before_deploy` and `deploy` sections)
 3. Add your Heroku app name to `deploy.app`, where it says "YOUR HEROKU APP NAME HERE". For example, if your domain is `cool-salty-conifer.herokuapp.com`, your app name is `cool-salty-conifer`.
 4. Install the Travis CLI tools by following [the instructions here](https://github.com/travis-ci/travis.rb#installation).
-5. Run `travis encrypt $(heroku auth:token)` to encrypt your Heroku API key. _**Warning:** do not run the `--add` command suggested by Travis, that will rewrite part of our existing config!_
+5. Run `travis encrypt $(heroku auth:token) --org` to encrypt your Heroku API key. _**Warning:** do not run the `--add` command suggested by Travis, that will rewrite part of our existing config!_
 6. Copy-paste your encrypted API key into the `.travis.yml` file under `deploy.api_key.secure`, where it says "YOUR ENCRYPTED API KEY HERE".
 7. `git add -A && git commit -m 'travis: activate deployment' && git push -u origin f/travis-deploy`
 8. Make a PR for the new branch, get it approved, and merge it into master.