Author: Paul Holden
MDL-73380 mod_workshop: add lang string for phase auto switch event.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=4a3290f39da952eb051fd499d30f37723e89f50f
http://github.com/moodle/moodle/commit/4a3290f39da952eb051fd499d30f37723e89f50f
+ 3.11 en [eventphaseautomaticallyswitched,mod_workshop]