Fixed typo libsbitsandbytes_cpu.so

bitsandbytes/cuda_setup/main.py

@@ -365,7 +365,7 @@ def evaluate_cuda_setup():
         print('='*35 + 'BUG REPORT' + '='*35)
         print('Welcome to bitsandbytes. For bug reports, please submit your error trace to: https://github.com/TimDettmers/bitsandbytes/issues')
         print('='*80)
-    if not torch.cuda.is_available(): return 'libsbitsandbytes_cpu.so', None, None, None, None
+    if not torch.cuda.is_available(): return 'libbitsandbytes_cpu.so', None, None, None, None
 
     cuda_setup = CUDASetup.get_instance()
     cudart_path = determine_cuda_runtime_lib_path()