Add whitespace linter (#24855)

server/public/model/group.go

@@ -243,7 +243,6 @@ func (group *Group) IsValidForUpdate() *AppError {
 var validGroupnameChars = regexp.MustCompile(`^[a-z0-9\.\-_]+$`)
 
 func (group *Group) IsValidName() *AppError {
-
 	if group.Name == nil {
 		if group.AllowReference {
 			return NewAppError("Group.IsValidName", "model.group.name.app_error", map[string]any{"GroupNameMaxLength": GroupNameMaxLength}, "", http.StatusBadRequest)