docs: add extension download url

README.md

@@ -1,9 +1,11 @@
 <div align="center">
 <img src="chrome-extension/public/icon-128.png" alt="logo"/>
-<h1> Quick Copy Link </h1>
+<a href='https://chromewebstore.google.com/detail/quick-copy-link/ghofdmbmhcgkhjmgoeclmffmdgaocaaj?hl=ko'><h1> Quick Copy Link </h1></a>
   <img src="https://img.shields.io/chrome-web-store/users/ghofdmbmhcgkhjmgoeclmffmdgaocaaj" />
 </div>
 
+[Quick Copy Link](https://chrome.google.com/webstore/detail/quick-copy-link/ghofdmbmhcgkhjmgoeclmffmdgaocaaj) is a Chrome extension that allows you to copy page titles and URLs together with a single shortcut. Paste directly into Slack, Markdown, Notion, Confluence, and more. Customize what to copy for specific websites in the settings.
+
 ### Key Features:
 - Simultaneously copy page title and URL
 - Paste directly into Slack, Markdown, Notion, Confluence, and more