Fix num of layers for deepseek-v3 (#1845)

Fix the number of layer issue introduced by #1804

Author: wwwjn

torchtitan/models/deepseek_v3/__init__.py

@@ -134,7 +134,7 @@
         dim=7168,
         inter_dim=18432,
         moe_inter_dim=2048,
-        n_layers=4,
+        n_layers=61,
         n_dense_layers=3,
         n_heads=128,
         moe_args=MoEArgs(