fix lint

Author: 6543

models/git/protected_branch_test.go

@@ -7,11 +7,11 @@ import (
 	"fmt"
 	"testing"
 
-	"github.com/stretchr/testify/assert"
-
 	"code.gitea.io/gitea/models/db"
 	repo_model "code.gitea.io/gitea/models/repo"
 	"code.gitea.io/gitea/models/unittest"
+
+	"github.com/stretchr/testify/assert"
 )
 
 func TestBranchRuleMatch(t *testing.T) {