AUTH-2077: Quotes open browser command in windows

cmd/cloudflared/shell/shell.go

@@ -4,25 +4,11 @@ import (
 	"io"
 	"os"
 	"os/exec"
-	"runtime"
 )
 
 // OpenBrowser opens the specified URL in the default browser of the user
 func OpenBrowser(url string) error {
-	var cmd string
-	var args []string
-
-	switch runtime.GOOS {
-	case "windows":
-		cmd = "cmd"
-		args = []string{"/c", "start"}
-	case "darwin":
-		cmd = "open"
-	default: // "linux", "freebsd", "openbsd", "netbsd"
-		cmd = "xdg-open"
-	}
-	args = append(args, url)
-	return exec.Command(cmd, args...).Start()
+	return getBrowserCmd(url).Start()
 }
 
 // Run will kick off a shell task and pipe the results to the respective std pipes