PATCH taxonomy term

I spent a great deal of time trying to PATCH a term using the endpoint /taxonomy/term/{term_id} using '_links':'{site.url}/rest/type/taxonomy/{bundle_name}'. It didn't work. What ended up working was using the entity type machine name for taxonomy, which is taxonomy_term, in the json _links value. What finally worked:

... '_links':'{site.url}/rest/type/taxonomy_term/{bundle_name}' ...

with the endpoint

{site.url}/taxonomy/term/{term_id}

Hope this saves somebody some time.