Fix type adapter type checks in 3.10

Author: rbell517

nisystemlink/clients/core/_uplink/_base_client.py

@@ -1,5 +1,6 @@
 # mypy: disable-error-code = misc
 
+from types import UnionType
 from typing import Any, Callable, Dict, get_origin, Type, Union
 
 import requests
@@ -78,7 +79,7 @@ def decoder(response: Response | Any) -> Any:
                 return adapter.validate_python(response, by_alias=True, strict=True)
 
         origin = get_origin(_class)
-        modelable_origin = origin is Union or origin is dict or origin is list
+        modelable_origin = origin is Union or origin is UnionType or origin is dict or origin is list
         if modelable_origin or utils.is_subclass(_class, JsonModel):
             if _type_adapters.get(_class) is None:
                 _type_adapters[_class] = TypeAdapter(_class)