go.mod,go.sum: update x/build

x/build is updated so that golang.org/x/vuln redirects correctly.

Change-Id: I61feab1a12ff5a2e4734f14e7546b29c0d691a57
Reviewed-on: https://go-review.googlesource.com/c/website/+/360720
Trust: Julie Qiu <julie@golang.org>
Run-TryBot: Julie Qiu <julie@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Website-Publish: DO NOT USE <dmitshur@google.com>

go.mod

@@ -3,19 +3,16 @@ module golang.org/x/website
 go 1.16
 
 require (
-	cloud.google.com/go v0.58.0 // indirect
 	cloud.google.com/go/datastore v1.2.0
 	github.com/gomodule/redigo v2.0.0+incompatible
-	github.com/google/go-cmp v0.5.5
+	github.com/google/go-cmp v0.5.6
 	github.com/microcosm-cc/bluemonday v1.0.2
 	github.com/yuin/goldmark v1.3.5
-	golang.org/x/build v0.0.0-20210422214718-6469a76194d9
-	golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4
-	golang.org/x/tools v0.1.3-0.20210525215409-a3eb095d6aee
+	golang.org/x/build v0.0.0-20211102155042-c046fca86e58
+	golang.org/x/net v0.0.0-20210726213435-c6fcb2dbf985
+	golang.org/x/tools v0.1.5
 	golang.org/x/tour v0.0.0-20210526031051-3891a3eb15c0
-	google.golang.org/api v0.27.0
-	google.golang.org/genproto v0.0.0-20200617032506-f1bdc9086088 // indirect
-	gopkg.in/yaml.v2 v2.3.0
+	google.golang.org/api v0.51.0
+	gopkg.in/yaml.v2 v2.4.0
 	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b
-	rsc.io/rf v0.0.0-20210401221041-ba8df2a1fd6c
 )