Update docs for --cache-dir cache-dir

Refs astral-sh#8626

docs/reference/cli.md

@@ -700,7 +700,7 @@ uv add [OPTIONS] <PACKAGES|--requirements <REQUIREMENTS>>
 
 </dd><dt><code>--cache-dir</code> <i>cache-dir</i></dt><dd><p>Path to the cache directory.</p>
 
-<p>Defaults to <code>$HOME/Library/Caches/uv</code> on macOS, <code>$XDG_CACHE_HOME/uv</code> or <code>$HOME/.cache/uv</code> on Linux, and <code>%LOCALAPPDATA%\uv\cache</code> on Windows.</p>
+<p>Defaults to <code>$HOME/.cache/uv</code> on macOS, <code>$XDG_CACHE_HOME/uv</code> or <code>$HOME/.cache/uv</code> on Linux, and <code>%LOCALAPPDATA%\uv\cache</code> on Windows. The <code>uv cache dir</code> command will show the location of the cache directory.</p>
 
 <p>May also be set with the <code>UV_CACHE_DIR</code> environment variable.</p>
 </dd><dt><code>--color</code> <i>color-choice</i></dt><dd><p>Control colors in output</p>