maintner: fix sort in GitHub.ForeachRepo
maintner: fix sort in GitHub.ForeachRepo

Previously, the ids[i].Owner < ids[i].Owner condition would never
be true due to the typo.

Found with staticcheck tool by Dominik Honnef.

Change-Id: Ia067e68909c7f30968c927d4bfa68ca5f7653959
Reviewed-on: https://go-review.googlesource.com/111878
Reviewed-by: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>

golang/build,golang/build,golang/build,golang/build