domain: show falsy names as anonymous for DEP0097

Many anonymous functions use the empty string as their name.
Since the DEP0097 logic was using nullish coalescing, these
functions were not being displayed as anonymous. This commit
updates the logic to use || instead of ??.

PR-URL: https://github.com/nodejs/node/pull/37550


Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Gerhard Stöbich <deb2001-github@yahoo.de>
Reviewed-By: James M Snell <jasnell@gmail.com>