Add missing version guard

Author: srittau

stdlib/concurrent/futures/process.pyi

@@ -146,7 +146,12 @@ class _ExecutorManagerThread(Thread):
     def wait_result_broken_or_wakeup(self) -> tuple[Any, bool, str]: ...
     def process_result_item(self, result_item: int | _ResultItem) -> None: ...
     def is_shutting_down(self) -> bool: ...
-    def terminate_broken(self, cause: str, bpe_message: str | None = None) -> None: ...
+
+    if sys.version_info >= (3, 15):
+        def terminate_broken(self, cause: str, bpe_message: str | None = None) -> None: ...
+    else:
+        def terminate_broken(self, cause: str) -> None: ...
+
     def flag_executor_shutting_down(self) -> None: ...
     def shutdown_workers(self) -> None: ...
     def join_executor_internals(self) -> None: ...