Updated GSoC 2019 student expectations to specify that multiple contributions are better.

Author: kgodey

content/gsoc-2019/student-expectations/contents.lr

@@ -16,7 +16,7 @@ Here's what we expect of students that Creative Commons is mentoring. If you hav
     * [The CC public wiki](https://wiki.creativecommons.org/)
 * Get feedback from the primary mentor associated with the project you're proposing before you submit a final application.
 * If you're proposing a project that's not on our official ideas list, please talk to our mentors to see if there is anyone interested in mentoring that project before you put any work into the proposal.
-* Making a successful contribution to one of our projects will help us get a sense of your work and is highly recommended. Please follow the guidelines in [Contributing Code](/contributing-code) to find issues to work on and submit a successful pull request.
+* Making successful contributions to our projects will help us get a sense of your work and is highly recommended (the more the better!). Please follow the guidelines in [Contributing Code](/contributing-code) to find issues to work on and submit a successful pull request.
 
 ## During the community bonding period