fix(docs): remove trailing transition causing Sphinx build failure (#5831)

Signed-off-by: Yuewei Na <nv-yna@users.noreply.github.com>
Co-authored-by: Yuewei Na <nv-yna@users.noreply.github.com>

docs/backends/trtllm/README.md

@@ -324,5 +324,3 @@ cache_transceiver_config:
 For example, see `examples/backends/trtllm/engine_configs/gpt-oss-120b/prefill.yaml`.
 
 **Related Issue:** [#4327](https://github.com/ai-dynamo/dynamo/issues/4327)
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