[Doc][AMD][ROCm]Added tips to refer to mi300x tuning guide for mi300x users (vllm-project#6754)

Signed-off-by: LeiWang1999 <[email protected]>

Author: hongxiayang

docs/source/getting_started/amd-installation.rst

@@ -142,3 +142,10 @@ Alternatively, wheels intended for vLLM use can be accessed under the releases.
     - Triton flash attention does not currently support sliding window attention. If using half precision, please use CK flash-attention for sliding window support.
     - To use CK flash-attention or PyTorch naive attention, please use this flag ``export VLLM_USE_TRITON_FLASH_ATTN=0`` to turn off triton flash attention. 
     - The ROCm version of PyTorch, ideally, should match the ROCm driver version.
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+.. tip::
+    - For MI300x (gfx942) users, to achieve optimal performance, please refer to `MI300x tuning guide <https://rocm.docs.amd.com/en/latest/how-to/tuning-guides/mi300x/index.html>`_ for performance optimization and tuning tips on system and workflow level.
+      For vLLM, please refer to `vLLM performance optimization <https://rocm.docs.amd.com/en/latest/how-to/tuning-guides/mi300x/workload.html#vllm-performance-optimization>`_.
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