style: sort imports in schemas

gns3server/schemas/controller/gns3vm.py

@@ -14,9 +14,10 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-from pydantic import BaseModel, Field
-from typing import Optional
 from enum import Enum
+from typing import Optional
+
+from pydantic import BaseModel, Field
 
 
 class WhenExit(str, Enum):