fix README

mehm8128 · mehm8128 · commit 828b5100304d · 2025-09-23T22:56:37.000+09:00
diff --git a/README.md b/README.md
@@ -13,7 +13,7 @@ You can create the table of contents as follows.
 ## Installation
 
 ```bash
-pnpm install @mehm8128/rehype-toc
+pnpm add @mehm8128/rehype-toc
 ```
 
 ## Usage
