Fix warning about invalid escape sequence

Author: grahamalama

jbi/queue.py

@@ -214,7 +214,7 @@ async def get_all(self) -> dict[int, AsyncIterator[QueueItem]]:
         all_items: dict[int, AsyncIterator[QueueItem]] = {}
         for filesystem_object in self.location.iterdir():
             if filesystem_object.is_dir() and re.match(
-                "\d", filesystem_object.name
+                r"\d", filesystem_object.name
             ):  # filtering out temp files from checks
                 all_items[int(filesystem_object.name)] = self.get(filesystem_object)
         return all_items