Add v3.25.4 to CHANGELOG.md.
Add v3.25.4 to CHANGELOG.md.

(cherry picked from commit ee25b41214aefe89edd75551f0c6e8125a60eb9b)

elwayman02/ember.js,mixonic/ember.js,elwayman02/ember.js,sly7-7/ember.js,emberjs/ember.js,sly7-7/ember.js,elwayman02/ember.js,sly7-7/ember.js,tildeio/ember.js,stefanpenner/ember.js,knownasilya/ember.js,mixonic/ember.js,knownasilya/ember.js,stefanpenner/ember.js,emberjs/ember.js,elwayman02/ember.js,knownasilya/ember.js,emberjs/ember.js,stefanpenner/ember.js,mixonic/ember.js,tildeio/ember.js,tildeio/ember.js