Updated mediawiki/extensions
Project: mediawiki/extensions/EducationProgram  eb3849d4533675cbb906606c1b172d7b947247cb

Make messaging consistent

* Complete change from "ambassador" to "volunteer" in messages.
* Change "Ambassador[s]" to "Volunteer[s]" in displayed special page names.
* Use second-person singular when talking about the user, instead of first person singular.

Change-Id: I2b76b163dcb1d68216eadb397452714557b34c5c