fix: correct internal anchor links in README

Remove erroneous dash from anchor links (#-features → #features) so
navigation links work correctly.

Co-Authored-By: Claude (glm-4.7) <noreply@anthropic.com>

Author: smilexth

README.md

@@ -11,7 +11,7 @@
   <!-- Tagline -->
   Home Assistant Real-time energy monitoring in your terminal
 
-  [Features](#-features) • [Install](#-installation) • [Config](#-configuration) • [Usage](#-usage)
+  [Features](#features) • [Install](#installation) • [Config](#configuration) • [Usage](#usage)
 
   <img src="emon-tui.png" width="1000" alt="emon-tui screenshot">