doc/go1.16: fix crypto typo
doc/go1.16: fix crypto typo

Change-Id: Icf962098cc22f16b0acf75db1e82eaddb9fa0c80
Reviewed-on: https://go-review.googlesource.com/c/go/+/258777
Trust: Roland Shoemaker <0d270388f2f92757a5de0f4bd891d3b392c44c4f@golang.org>
Run-TryBot: Roland Shoemaker <0d270388f2f92757a5de0f4bd891d3b392c44c4f@golang.org>
Reviewed-by: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>

nawawi/go,nawawi/go,cloudflare/go,nawawi/go,nawawi/go,golang/go,cloudflare/go,cloudflare/go,CAFxX/go,CAFxX/go,nawawi/go,CAFxX/go,nawawi/go,nawawi/go,nawawi/go,cloudflare/go,golang/go,golang/go,CAFxX/go,CAFxX/go,CAFxX/go,CAFxX/go,golang/go,cloudflare/go,CAFxX/go,cloudflare/go,golang/go,golang/go,golang/go,cloudflare/go,golang/go,cloudflare/go