build(examples): change processes number from 8 to 1 in deepspeed zero3 config

examples/accelerate_configs/deepspeed_zero3.yaml

@@ -8,12 +8,12 @@ deepspeed_config:
   zero3_save_16bit_model: true
   zero_stage: 3
 distributed_type: DEEPSPEED
-downcast_bf16: 'no'
+downcast_bf16: "no"
 machine_rank: 0
 main_training_function: main
 mixed_precision: bf16
 num_machines: 1
-num_processes: 8
+num_processes: 1
 rdzv_backend: static
 same_network: true
 tpu_env: []