docs(pipeline_parallel): clarify seq_length behavior with variable_seq_lengths under PP#4471

edenfunf wants to merge 1 commit intoNVIDIA:mainNVIDIA/Megatron-LM:mainfrom

edenfunf:fix/2064-variable-seq-lengths-pp-docstringedenfunf/Megatron-LM:fix/2064-variable-seq-lengths-pp-docstringCopy head branch name to clipboard