docs(freebsd): correct patched-file list (3 changes, drop phantom voice_mode.py)

The README claimed "six targeted changes" and listed tools/voice_mode.py as
patched, but commit a9e4caa3f touched only three code files (setup.py,
uninstall.py, install-freebsd.sh) plus this README. voice_mode.py was never
modified — voice works on FreeBSD via pkg-installed ffplay without code
changes, as the same README already states. Drop the phantom row and fix the
count.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

README-FreeBSD.md

@@ -4,13 +4,12 @@ This is a clean-room FreeBSD compatibility layer for [Hermes Agent](https://gith
 
 ## What's patched
 
-Six targeted changes for FreeBSD native support:
+Three targeted changes for FreeBSD native support:
 
 | File | Change |
 |------|--------|
 | `hermes_cli/setup.py` | FreeBSD in platform detection, `pkg` for espeak-ng, rc.d service support |
 | `hermes_cli/uninstall.py` | `/usr/local/bin` symlink removal on FreeBSD |
-| `tools/voice_mode.py` | Audio playback on FreeBSD (aplay/ffplay) |
 | `scripts/install-freebsd.sh` | Native FreeBSD installer (POSIX sh, pkg, uv) |
 
 Clipboard (xclip) and voice (ffplay) work on FreeBSD without code changes — xclip and ffmpeg are available via `pkg`.