Fix Russian pronunciation for 6

[D-side]

Applied one change to the Russian dictionary in order to fix #36

update word_phonemes set phonemes = "ʂ eː s tʲ" where word = "шесть";

Before:

sqlite> select * from word_phonemes where word = "шесть";
530064|шесть|0|ʂ eː s tʲ|

After:

sqlite> select * from word_phonemes where word = "шесть";
530064|шесть|0|ʂ oː s tʲ|

[D-side]

@synesthesiam mind giving this a merge please? 🙂