Fix documented default round limit

[ssynb]

Summary

• update the English and Chinese configuration tables to show the actual default of 25 rounds
• update both CLI reference tables to the same value

Evidence

DEFAULT_MAX_ROUNDS is 25 in src/lh_harness/types.py, run.max_rounds defaults to 25 in src/lh_harness/config.py, and the CLI derives its fallback and help text from that constant. The READMEs still documented 30.

Validation

• git diff --check
• compared all four documented values against src/lh_harness/types.py and src/lh_harness/config.py

No runtime code is changed, so no test suite was run.