ROCm 7.2.3 adds profiling, XIO docs

This is a useful but incremental stack update: no new hardware support, no OS expansion, just the kind of polish that matters when you’re trying to keep AMD GPUs viable for serious AI workloads.

• –Better vLLM profiling should make performance debugging less noisy for teams tracing real inference runs
• –MIGraphX gets practical gains in gather-heavy workloads and ONNX Runtime reliability, which matters for embedding and inference pipelines
• –ROCm XIO documentation is the more strategic piece, because direct accelerator I/O hints at a broader push to reduce CPU bottlenecks
• –The lack of Ubuntu 26.04 support is a reminder that ROCm still trails the fastest-moving Linux release cadence
• –For developers already on ROCm, this is a quality-of-life release; for everyone else, it mostly reinforces that AMD is still filling in platform maturity gaps