[ru] fix Spy x Family chapter number

[valdotle]

Someone reported this on MD where the bot uploaded it as 127.1
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[curche]

LGTM, merging this for now.

Seems like all chapters of russian are free to read so might need to check entire chapter list for a pattern like x, y.1, y.2, c, z

[valdotle]

LGTM, merging this for now.

Seems like all chapters of russian are free to read so might need to check entire chapter list for a pattern like x, y.1, y.2, c, z

I went back and checked, and it seems like this was the only problematic chapter. Probably because it's an extra illustration (so would expect .5) while also having a number in the chapter title, so the uploader picked it up as a partial chapter.
That being said, the decimals are a bit confusing (.2 .1 and .5 don't always seem to follow a clear rule) + I got caught off guard by chapters missing the volume number midway... 😅
I should have a look into having the volume number logic use unavailable chapter metadata as well some time...