ssh: fix typo in unexported comment

Thanks to Anisse Astier (@anisse) for noticing.

Change-Id: I1c282b2bb54601cf5649e194eafd5344c70331ca
Reviewed-on: https://go-review.googlesource.com/38916
Reviewed-by: dnv aps Sn <sndnvaps@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
1 file changed