go.mod: bump golang.zx2c4.com/wireguard/windows from 0.3.16 to 0.4.9

Bumps golang.zx2c4.com/wireguard/windows from 0.3.16 to 0.4.9.

---
updated-dependencies:
- dependency-name: golang.zx2c4.com/wireguard/windows
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

go.mod

@@ -38,15 +38,15 @@ require (
 	github.com/toqueteos/webbrowser v1.2.0
 	github.com/ulikunitz/xz v0.5.10 // indirect
 	go4.org/mem v0.0.0-20201119185036-c04c5a6ff174
-	golang.org/x/crypto v0.0.0-20210616213533-5ff15b29337e
-	golang.org/x/net v0.0.0-20210614182718-04defd469f4e
+	golang.org/x/crypto v0.0.0-20210817164053-32db794688a5
+	golang.org/x/net v0.0.0-20210903162142-ad29c8ab022f
 	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c
-	golang.org/x/sys v0.0.0-20210817190340-bfb29a6856f2
+	golang.org/x/sys v0.0.0-20210906170528-6f6e22806c34
 	golang.org/x/term v0.0.0-20210503060354-a79de5458b56
 	golang.org/x/time v0.0.0-20210611083556-38a9dc6acbc6
 	golang.org/x/tools v0.1.2
-	golang.zx2c4.com/wireguard v0.0.0-20210624150102-15b24b6179e0
-	golang.zx2c4.com/wireguard/windows v0.3.16
+	golang.zx2c4.com/wireguard v0.0.0-20210905140043-2ef39d47540c
+	golang.zx2c4.com/wireguard/windows v0.4.9
 	honnef.co/go/tools v0.2.1
 	inet.af/netaddr v0.0.0-20210721214506-ce7a8ad02cc1
 	inet.af/netstack v0.0.0-20210622165351-29b14ebc044e
@@ -181,7 +181,7 @@ require (
 	go4.org/intern v0.0.0-20210108033219-3eb7198706b2 // indirect
 	go4.org/unsafe/assume-no-moving-gc v0.0.0-20201222180813-1025295fd063 // indirect
 	golang.org/x/mod v0.4.2 // indirect
-	golang.org/x/text v0.3.7-0.20210524175448-3115f89c4b99 // indirect
+	golang.org/x/text v0.3.7 // indirect
 	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
 	gopkg.in/ini.v1 v1.62.0 // indirect
 	gopkg.in/warnings.v0 v0.1.2 // indirect