some small changes about our wording for webpack
some small changes about our wording for webpack

jbuck/donate.mozilla.org,mirror-mozilla-svn/donate.mozilla.org,alicoding/donate.mozilla.org,MozillaItalia/donate.mozilla.org,mozilla/donate.mozilla.org,ScottDowne/donate.mozilla.org,bjdixon/donate.mozilla.org,mathjazz/donate.mozilla.org,alanmoo/donate.mozilla.org