There isn't really a standard name for this case convention, and there is disagreement over what it should be called.

That said, as of 2019, there is a strong case to be made that kebab-case is winning:

https://trends.google.com/trends/explore?date=all&q=kebab-case,spinal-case,lisp-case,dash-case,caterpillar-case

spinal-case is a distant second, and no other terms have any traction at all.

Additionally, kebab-case has entered the lexicon of several javascript code libraries, e.g.:

However, there are still other terms that people use. Lisp has used this convention for decades as described in this Wikipedia entry, so some people have described it as lisp-case. Some other forms I've seen include caterpillar-case, dash-case, and hyphen-case, but none of these is standard.

So the answer to your question is: No, there isn't a single widely-accepted name for this case convention analogous to snake_case or camelCase, which are widely-accepted.