Use ZeroGPU SDK detection for generation concurrency

gradio_app.py

@@ -14,6 +14,7 @@ import time
 from collections import OrderedDict
 
 import spaces
+from spaces.config import Config as SpacesConfig
 from dataclasses import asdict, dataclass, replace
 from functools import partial
 from importlib.resources import files
@@ -864,7 +865,7 @@ def build_app(
             [checkpoint] + fields,
             [gallery, status, last_generation],
             # ZeroGPU isolates GPU tasks in workers; local runs share the pipeline.
-            concurrency_limit=32 if gr.utils.is_zero_gpu_space() else 1,
+            concurrency_limit=32 if SpacesConfig.zero_gpu else 1,
             concurrency_id="model",
             api_name="generate",
         )