all: update to x/net@
bff14c52567061031b9761881907c39e24792736
This brings in CL 722200 which adds necessary HTTP/2 support for
net/http.Transport.NewClientConn.
For #75772
Change-Id: I5489232401096982ed21002f293dd0f87fe2fba6
Reviewed-on: https://go-review.googlesource.com/c/go/+/723901
Reviewed-by: Nicholas Husin <nsh@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Damien Neil <dneil@google.com>
Reviewed-by: Nicholas Husin <husin@google.com>