Update configuration_llama.py: fixed broken link (#28946)

* Update configuration_llama.py: fix broken link

* [Nit] Explicit redirection not required
Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>

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Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>

src/transformers/models/llama/configuration_llama.py

@@ -78,7 +78,7 @@ class LlamaConfig(PretrainedConfig):
             End of stream token id.
         pretraining_tp (`int`, *optional*, defaults to 1):
             Experimental feature. Tensor parallelism rank used during pretraining. Please refer to [this
-            document](https://huggingface.co/docs/transformers/parallelism) to understand more about it. This value is
+            document](https://huggingface.co/docs/transformers/main/perf_train_gpu_many#tensor-parallelism) to understand more about it. This value is
             necessary to ensure exact reproducibility of the pretraining results. Please refer to [this
             issue](https://github.com/pytorch/pytorch/issues/76232).
         tie_word_embeddings (`bool`, *optional*, defaults to `False`):