[NFC] polish applications/Chat/benchmarks/benchmark_opt_lora_dummy.py code style (#5225)

applications/Chat/benchmarks/benchmark_opt_lora_dummy.py

@@ -76,9 +76,11 @@ def main(args):
     if args.strategy == "ddp":
         strategy = DDPStrategy()
     elif args.strategy == "colossalai_gemini":
-        strategy = GeminiStrategy(placement_policy="static",initial_scale=2**5)
+        strategy = GeminiStrategy(placement_policy="static", initial_scale=2**5)
     elif args.strategy == "colossalai_gemini_cpu":
-        strategy = GeminiStrategy(placement_policy="static", offload_optim_frac=1.0, offload_param_frac=1.0, initial_scale=2**5)
+        strategy = GeminiStrategy(
+            placement_policy="static", offload_optim_frac=1.0, offload_param_frac=1.0, initial_scale=2**5
+        )
     elif args.strategy == "colossalai_zero2":
         strategy = LowLevelZeroStrategy(stage=2, placement_policy="cuda")
     elif args.strategy == "colossalai_zero2_cpu":