[web] use ConfigDict instead of class Config

the latter has been deprecated in pydantic v2

web/blueprints/infrastructure/tables.py

@@ -1,7 +1,6 @@
 from flask import url_for
 from flask_login import current_user
-from pydantic import BaseModel
-
+from pydantic import BaseModel, ConfigDict
 
 from web.table.table import (
     BootstrapTable,
@@ -31,6 +30,7 @@ class SubnetTable(BootstrapTable):
 
 
 class SubnetRow(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
     id: int
     description: str | None
     address: str
@@ -39,9 +39,6 @@ class SubnetRow(BaseModel):
     free_ips: str  # the sort name
     free_ips_formatted: str
 
-    class Config:
-        from_attributes = True
-
 
 class SwitchTable(BootstrapTable):
     id = Column("#")
@@ -73,13 +70,11 @@ class VlanTable(BootstrapTable):
 
 
 class VlanRow(BaseModel):
+    config = ConfigDict(from_attributes=True)
     id: int
     name: str
     vid: int
 
-    class Config:
-        from_attributes = True
-
 
 class PortTable(BootstrapTable):
     class Meta: