[req] Update Polish dictionary version in Dict. table

Hello,

for both Aspell 0.50 and 0.60, links in the Dictionaries table
(https://ftp.gnu.org/gnu/aspell/dict/0index.html) lead to a Polish
dictionary from 2006, but the current version is 20200727. An update
would be nice.

Additionally, instead of a file, perhaps a link to the webpage
(https://sjp.pl/slownik/en/) could be a better option?


S. U.