fix: update ResponseProtocol definition to use TypeAlias for clarity

Author: cak

secure/secure.py

@@ -7,7 +7,7 @@
 import logging
 import re
 from types import MappingProxyType
-from typing import TYPE_CHECKING, Literal, Protocol
+from typing import TYPE_CHECKING, Literal, Protocol, TypeAlias
 
 if TYPE_CHECKING:
     from collections.abc import Iterable, Mapping
@@ -93,7 +93,7 @@ def set_header(self, key: str, value: str) -> object | None: ...
 
 
 # Union type for supported response objects.
-ResponseProtocol: ResponseProtocol = HeadersProtocol | SetHeaderProtocol
+ResponseProtocol: TypeAlias = HeadersProtocol | SetHeaderProtocol
 
 
 # ---------------------------------------------------------------------------