Update unit_tests.yml

Author: Qubitium

.github/workflows/unit_tests.yml

@@ -60,7 +60,7 @@ env:
   CUDA_VISIBLE_DEVICES: 0
   TORCH_CUDA_ARCH_LIST: '8.6 8.9 9.0 12.0'
   PYTORCH_ALLOC_CONF: 'expandable_segments:True'
-  MAX_JOBS: 4
+  MAX_JOBS: 8 # compile concurrency
   RUNNER: 10.0.13.31
   XEON5: 10.0.14.249
   UV_INDEX_URL: http://10.0.14.249/simple