chore: use gofumpt for code formatting

internal/provider/protonvpn/updater/api.go

@@ -9,9 +9,7 @@ import (
 	"net/netip"
 )
 
-var (
-	ErrHTTPStatusCodeNotOK = errors.New("HTTP status code not OK")
-)
+var ErrHTTPStatusCodeNotOK = errors.New("HTTP status code not OK")
 
 type apiData struct {
 	LogicalServers []logicalServer `json:"LogicalServers"`
@@ -36,7 +34,8 @@ type physicalServer struct {
 }
 
 func fetchAPI(ctx context.Context, client *http.Client) (
-	data apiData, err error) {
+	data apiData, err error,
+) {
 	const url = "https://api.protonmail.ch/vpn/logicals"
 
 	request, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)