simd/archsimd: correct algorithm name in SHA256 ops documentation
The three SHA256 ops (SHA256Message1, SHA256Message2 and SHA256TwoRounds)
all incorrectly referred to the SHA1 algorithm in their documentation
rather than SHA256.
Change-Id: Id6c1bfe4fee4517c0e498fb063cc9112464bc1e7
Reviewed-on: https://go-review.googlesource.com/c/go/+/735420 Reviewed-by: Junyang Shao <shaojunyang@google.com> Reviewed-by: Cherry Mui <cherryyz@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>