Add slowradio.cz to bookmarks

dotfiles/config/bmo/wish.ini

     mfp     = http://musicforprogramming.net/
     radios  = http://www.radios.cz/
     samharris = https://www.samharris.org/podcast/full_archive
+    slowradio = http://www.slowradio.cz/
     rdt     = https://www.reddit.com/subreddits/
     so      = https://stackoverflow.com/
     tjc     = https://together.jolla.com/