Update NEWS about hunspell spellchecker.
Update NEWS about hunspell spellchecker.

RevBy: TrustMe

develersrl/maliit-demo-qml,RHawkeyed/plugins,maliit/plugins,maliit/plugins,RHawkeyed/plugins,KDE/plasma-maliit-plugins,develersrl/maliit-demo-qml,KDE/plasma-maliit-plugins,develersrl/maliit-demo-qml,RHawkeyed/plugins,maliit/plugins,RHawkeyed/plugins,RHawkeyed/plugins,maliit/plugins,KDE/plasma-maliit-plugins,develersrl/maliit-demo-qml,KDE/plasma-maliit-plugins