update: A couple of updates of the Slovak stemmer
update: A couple of updates of the Slovak stemmer

* Updated a few more leftovers from the last pass on the Czech-only
  parts of this stemmer.

Signed-off-by: mr.Shu <8e7be411ad89ade93d144531f3925d0bb4011004@shu.io>

mrshu/stemm-sk