docs(CHANGES): Add user-focused notes for linkable CLI arguments (#1010)

Document the new linkable arguments feature with headerlinks,
visual styling improvements, and default value badges

Author: tony

CHANGES

@@ -35,6 +35,17 @@ $ pipx install --suffix=@next 'tmuxp' --pip-args '\--pre' --force
 _Notes on the upcoming release will go here._
 <!-- END PLACEHOLDER - ADD NEW CHANGELOG ENTRIES BELOW THIS LINE -->
 
+### Documentation
+
+#### Linkable CLI arguments and options (#1010)
+
+CLI documentation now supports direct linking to specific arguments:
+
+- **Linkable options**: Each `--option` and positional argument has a permanent URL anchor (e.g., `cli/load.html#-d`)
+- **Headerlinks**: Hover over any argument to reveal a ¶ link for easy sharing
+- **Visual styling**: Argument names displayed with syntax-highlighted backgrounds for better readability
+- **Default value badges**: Default values shown as styled inline code (e.g., `auto`)
+
 ## tmuxp 1.64.0 (2026-01-24)
 
 ### Documentation