Merge pull request #307 from scala/revamp-donate-followup

reword donate button

Author: bishabosha

donate.md

@@ -4,7 +4,7 @@ layout: contact
 
 ## Support the Scala Center!
 
-<a target="_blank" class="btn btn-default btn-md btn-block" href="https://donate.stripe.com/fZefZYfMC5Y0cXS9AD">Make a one-time donation to the Scala Center</a>
+<a target="_blank" class="btn btn-default btn-md btn-block" href="https://donate.stripe.com/fZefZYfMC5Y0cXS9AD">Donate to the Scala Center</a>
 
 Email us at [scala.center@epfl.ch](mailto:scala.center@epfl.ch) if you'd like to turn your
 one-time donation into a monthly or yearly recurring donation. (For companies, please consider [the corporate membership options](./corporate-membership.html).)