Fix formatting for npm installation command

Kenzo-Wada · Kenzo-Wada · commit ff526575122f · 2025-10-25T23:57:15.000+09:00
diff --git a/README.md b/README.md
@@ -49,6 +49,7 @@ $ cargo install thanks-stars
 
 ````bash
 $ npm install -g thanks-stars
+````
 
 ### 💻 Shell installer (macOS/Linux)
 
