docs: require FunASR 1.3.25 for Nano guides

[LauraGPT]

Summary

• update Fun-ASR-Nano vLLM and finetuning install commands to the current funasr 1.3.25 release
• keep the docs regression test aligned so current Nano install docs do not drift back to older release floors

Verification

• python3 -m pytest -q tests/test_docs_funasr_install_commands.py
• python3 -m pytest -q tests/test_markdown_relative_links.py
• python3 -m pytest -q tests/test_realtime_ws_service.py -k 'postprocess_hotwords or postprocess_hotword_file'
• git diff --check

[gemini-code-assist]

Caution

The consumer version of Gemini Code Assist on GitHub has been sunset. All code review activity has officially ceased.