Polish filters - change url

[MajkiIT]

I must change url to filters.

Old url https://www.certyficate.it/adblock/adblock.txt
new url https://raw.githubusercontent.com/MajkiIT/polish-ads-filter/master/polish-adblock-filters/adblock.txt

I make redirect from old to new url.

Thanks

[TPS]

@gorhill Commited in 7a49a7f, but not auto-closed....

[gorhill]

Because there is another step to the fix, in filter-lists.json.