[http.client] Specify HTTPResponse.info

Author: donbarbos

stdlib/http/client.pyi

@@ -161,7 +161,7 @@ class HTTPResponse(io.BufferedIOBase, BinaryIO):  # type: ignore[misc]  # incomp
         self, exc_type: type[BaseException] | None, exc_val: BaseException | None, exc_tb: types.TracebackType | None
     ) -> None: ...
     @deprecated("Deprecated since Python 3.9. Use `HTTPResponse.headers` attribute instead.")
-    def info(self) -> email.message.Message: ...
+    def info(self) -> HTTPMessage: ...
     @deprecated("Deprecated since Python 3.9. Use `HTTPResponse.url` attribute instead.")
     def geturl(self) -> str: ...
     @deprecated("Deprecated since Python 3.9. Use `HTTPResponse.status` attribute instead.")