Create a tag for meld

As per https://gitlab.gnome.org/GNOME/meld/-/issues/508#note_935859, meld maintainer agreed to move the meld-list to Discourse as per Oct 30 2020. As part of the move preparation, please create a meld tag so the change can be announced to the subscribers.

Thanks again,
Olav

Tag “meld” is now available.