fix typos in changelog [ci skip]
fix typos in changelog [ci skip]

hoverduck/mocha,adamgruber/mocha,igwejk/mocha,boneskull/mocha,boneskull/mocha,boneskull/mocha,hoverduck/mocha,igwejk/mocha,mochajs/mocha,outsideris/mocha,hoverduck/mocha,hoverduck/mocha,mochajs/mocha,adamgruber/mocha,adamgruber/mocha,mochajs/mocha,outsideris/mocha