doc/go1.19: fix crypto tags
doc/go1.19: fix crypto tags

Closes an unclosed <code> tag, and tags a type that was untagged.

Change-Id: I9a1efda07f783f0ca7a93ffefbda4e29f5fc8d41
Reviewed-on: https://go-review.googlesource.com/c/go/+/411694
Auto-Submit: Roland Shoemaker <0d270388f2f92757a5de0f4bd891d3b392c44c4f@golang.org>
TryBot-Result: Gopher Robot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>
Reviewed-by: Julie Qiu <e6cb64861edcc38971590ff27c111e0e672de045@google.com>
Run-TryBot: Roland Shoemaker <0d270388f2f92757a5de0f4bd891d3b392c44c4f@golang.org>

golang/go,golang/go,nawawi/go,nawawi/go,nawawi/go,nawawi/go,golang/go,nawawi/go,golang/go,nawawi/go,nawawi/go,golang/go,golang/go,golang/go,nawawi/go,golang/go