[Bugfix] fix max-file-size type from str to int (#21675)

Signed-off-by: Andy Xie <andy.xning@gmail.com>

examples/offline_inference/save_sharded_state.py

@@ -47,7 +47,7 @@ def parse_args():
     )
     parser.add_argument(
         "--max-file-size",
-        type=str,
+        type=int,
         default=5 * 1024**3,
         help="max size (in bytes) of each safetensors file",
     )