fix import order/sort api branch test

Author: tle-huu

integrations/api_branch_test.go

@@ -5,11 +5,12 @@
 package integrations
 
 import (
-	api "code.gitea.io/gitea/modules/structs"
 	"net/http"
 	"net/url"
 	"testing"
 
+	api "code.gitea.io/gitea/modules/structs"
+
 	"github.com/stretchr/testify/assert"
 )