hyphenate-internal-words.scm: Minor improvement
Instead of having calls to @hyphenation
for each entry, use a single call
for all entries.
Besides more efficient, this avoids a crash with luatex
ID 7509 (the
binary part of TeXLive 2022): it cannot handle a large amount of
@hyphenation
calls due to an allocation bug.
Also sort entries to get identical results for different runs.