chore: use gofumpt for code formatting

internal/provider/windscribe/updater/servers.go

@@ -12,12 +12,11 @@ import (
 	"github.com/qdm12/gluetun/internal/provider/common"
 )
 
-var (
-	ErrNoWireguardKey = errors.New("no wireguard public key found")
-)
+var ErrNoWireguardKey = errors.New("no wireguard public key found")
 
 func (u *Updater) FetchServers(ctx context.Context, minServers int) (
-	servers []models.Server, err error) {
+	servers []models.Server, err error,
+) {
 	data, err := fetchAPI(ctx, u.client)
 	if err != nil {
 		return nil, err