chore: use gofumpt for code formatting

internal/healthcheck/client.go

@@ -8,9 +8,7 @@ import (
 	"net/http"
 )
 
-var (
-	ErrHTTPStatusNotOK = errors.New("HTTP response status is not OK")
-)
+var ErrHTTPStatusNotOK = errors.New("HTTP response status is not OK")
 
 type Client struct {
 	httpClient *http.Client

internal/healthcheck/server.go

@@ -17,7 +17,8 @@ type Server struct {
 }
 
 func NewServer(config settings.Health,
-	logger Logger, vpnLoop StatusApplier) *Server {
+	logger Logger, vpnLoop StatusApplier,
+) *Server {
 	return &Server{
 		logger:  logger,
 		handler: newHandler(),