put the comma in the right place

src/nanotron/models/llama.py

@@ -919,7 +919,7 @@ def get_block_compute_costs(self):
             # CausalSelfAttention (qkv proj + attn out) + MLP
             LlamaDecoderLayer: 2 * model_config.num_attention_heads * d_qkv * model_config.hidden_size # Q output projection
             + 2 * model_config.num_key_value_heads * d_qkv * model_config.hidden_size # KV 
-            + 3 * d_ff * model_config.hidden_size # for the MLP (3 because of the gated mechanism),
+            + 3 * d_ff * model_config.hidden_size, # for the MLP (3 because of the gated mechanism)
             # This is the last lm_head
             TensorParallelColumnLinear: model_config.vocab_size * model_config.hidden_size,
         }