Stdlib: add container default values (#9909)

stdlib/http/client.pyi

@@ -158,7 +158,7 @@ class HTTPConnection:
         method: str,
         url: str,
         body: _DataType | str | None = None,
-        headers: Mapping[str, str] = ...,
+        headers: Mapping[str, str] = {},
         *,
         encode_chunked: bool = False,
     ) -> None: ...

stdlib/http/cookiejar.pyi

@@ -99,7 +99,7 @@ class DefaultCookiePolicy(CookiePolicy):
             strict_ns_domain: int = 0,
             strict_ns_set_initial_dollar: bool = False,
             strict_ns_set_path: bool = False,
-            secure_protocols: Sequence[str] = ...,
+            secure_protocols: Sequence[str] = ("https", "wss"),
         ) -> None: ...
     else:
         def __init__(