docs: fix README.md badges rendering as code block due to indentation

Author: nodfans

README.md

@@ -14,10 +14,9 @@
     <a href="https://github.com/nodfans/helixdb-explorer/issues">🐞 Report Bug</a>
   </p>
 
-    <img src="https://img.shields.io/github/license/nodfans/helixdb-explorer?style=flat-square&cacheSeconds=3600" />
-    <img src="https://img.shields.io/github/v/release/nodfans/helixdb-explorer?style=flat-square&color=6366f1&cacheSeconds=3600" />
-    <img src="https://img.shields.io/github/downloads/nodfans/helixdb-explorer/total?style=flat-square&color=22c55e&label=downloads&cacheSeconds=3600" />
-
+  <img src="https://img.shields.io/github/license/nodfans/helixdb-explorer?style=flat-square&cacheSeconds=3600" />
+  <img src="https://img.shields.io/github/v/release/nodfans/helixdb-explorer?style=flat-square&color=6366f1&cacheSeconds=3600" />
+  <img src="https://img.shields.io/github/downloads/nodfans/helixdb-explorer/total?style=flat-square&color=22c55e&label=downloads&cacheSeconds=3600" />
 </div>
 
 ## 📦 Installation