pidgin/pidgin

Update the date in COPYRIGHT as it was a few years behind
release-2.x.y
7 weeks ago, Gary Kramlich
21a56db5f998
Update the date in COPYRIGHT as it was a few years behind

Testing Done:
None

Reviewed at https://reviews.imfreedom.org/r/3007/
REVIEWBOARD_URL = "https://reviews.imfreedom.org/"
REPOSITORY = "pidgin/pidgin"
REPOSITORY_TYPE = "mercurial"
BRANCH = "release-2.x.y"
LAND_DEST_BRANCH = "release-2.x.y"
LAND_PUSH = False