go.*: bump gio to avoid a deadlock at startup

Updates tailscale/tailscale#471

Signed-off-by: Elias Naur <mail@eliasnaur.com>

go.mod

@@ -4,7 +4,7 @@ go 1.14
 
 require (
 	eliasnaur.com/font v0.0.0-20200617114307-e02d32decb4b
-	gioui.org v0.0.0-20200722191435-e381ff40d66b
+	gioui.org v0.0.0-20200724173311-4a9d97784f24
 	gioui.org/cmd v0.0.0-20200622185735-5bd0ecea5e43
 	github.com/go-bindata/go-bindata v3.1.2+incompatible
 	github.com/tailscale/wireguard-go v0.0.0-20200710044538-9320f191f6b1

go.sum

@@ -3,8 +3,8 @@ dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7
 eliasnaur.com/font v0.0.0-20200617114307-e02d32decb4b h1:J9r7EuPdhvBTafg34EqrObAm/bDEaDh7LvhKJPGficE=
 eliasnaur.com/font v0.0.0-20200617114307-e02d32decb4b/go.mod h1:CYwJpIhpzVfoHpFXGlXjSx9mXMWtHt4XXmZb6RjumRc=
 gioui.org v0.0.0-20200622101735-5368743478e0/go.mod h1:jiUwifN9cRl/zmco43aAqh0aV+s9GbhG13KcD+gEpkU=
-gioui.org v0.0.0-20200722191435-e381ff40d66b h1:gnY/k6FSe0jYKiVFDG0ZSnBRry1zgh5c841NFifuQTA=
-gioui.org v0.0.0-20200722191435-e381ff40d66b/go.mod h1:jiUwifN9cRl/zmco43aAqh0aV+s9GbhG13KcD+gEpkU=
+gioui.org v0.0.0-20200724173311-4a9d97784f24 h1:ramiRh46C/FaKzGYnUKAjiBoO44dnU42Urzyeljy7EQ=
+gioui.org v0.0.0-20200724173311-4a9d97784f24/go.mod h1:jiUwifN9cRl/zmco43aAqh0aV+s9GbhG13KcD+gEpkU=
 gioui.org/cmd v0.0.0-20200622185735-5bd0ecea5e43 h1:Wj8OoCIw06dNSSSPAAipnmcG7dbFn+7Et9IY37e1HBU=
 gioui.org/cmd v0.0.0-20200622185735-5bd0ecea5e43/go.mod h1:KrsGUGWoPetiRyuDmOd/GTNCBFi2u4UbESTFXZ5YqXY=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=