* embassy=embassy to embassy=yes
embassy=embassy is an unwanted tagging fueled by iD presets showing top taginfo suggestions
there was confused philosophical discussion about deprecations on tagging mailing list - but of all involved noone considered embassy=embassy as a good idea
see https://lists.openstreetmap.org/pipermail/tagging/2022-January/063459.html
* specify values for "embassy" tag (closes#340)
Co-authored-by: Mateusz Konieczny <matkoniecz@gmail.com>