nebari-dev#1792 Use @override from typing-extensions

pyproject.toml

@@ -72,6 +72,7 @@ dependencies = [
     "ruamel.yaml==0.18.6",
     "typer==0.9.0",
     "packaging==23.2",
+    "typing-extensions==4.12.0",
 ]
 
 [project.optional-dependencies]

src/_nebari/upgrade.py

@@ -12,12 +12,13 @@
 import textwrap
 from abc import ABC
 from pathlib import Path
-from typing import Any, ClassVar, Dict, override
+from typing import Any, ClassVar, Dict
 
 import rich
 from packaging.version import Version
 from pydantic import ValidationError
 from rich.prompt import Prompt
+from typing_extensions import override
 
 from _nebari.config import backup_configuration
 from _nebari.stages.infrastructure import (