Update POTFILES.in
In be094799 the spellcheck plugin folder was deleted, but files are still referenced in POTFILES.in, causing xgettext to fail to create new .pot files.
Can also be seen on https://l10n.gnome.org/module/gnome-builder/
In be094799 the spellcheck plugin folder was deleted, but files are still referenced in POTFILES.in, causing xgettext to fail to create new .pot files.
Can also be seen on https://l10n.gnome.org/module/gnome-builder/