Wrong link in README

[danarmak]

The last line of README.md says:

See #13 for why await is not possible in closures

But #13 is clearly not the right link target; I don't know what is.

[steinybot]

Is #32 the right link?

[danarmak]

It's at least a relevant one! I don't know what link was originally intended.

[SethTisue]

thanks for reporting — it seems plausible to me #32 was the intended ticket, and I don't have a different guess, so I went ahead.