fix: use correct error code

Author: janbritz

questionpy_server/web/errors.py

@@ -40,7 +40,7 @@ def __init__(self, *, reason: str | None, temporary: bool) -> None:
         super().__init__(
             msg="Question package did not answer in a reasonable amount of time",
             body=RequestError(
-                error_code=RequestErrorCode.OUT_OF_MEMORY,
+                error_code=RequestErrorCode.WORKER_TIMEOUT,
                 reason=reason,
                 temporary=temporary,
             ),