press - pr: change release date

Log Message:
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change release date

Modified Files:
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pr/releases/8.3/ja:
presskit83.html.ja (r1.3 -> r1.4)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/press/pr/releases/8.3/ja/presskit83.html.ja.diff?r1=1.3&r2=1.4)