Fix badge image source for Patroni in README

Author: DHowor1d

README.md

@@ -136,7 +136,7 @@
       <td>데이터베이스</td>
       <td>
         <img src="https://img.shields.io/badge/postgres-%23316192.svg?style=for-the-badge&logo=postgresql&logoColor=white"/>
-        <img src="https://img.shields.io/badge/Patroni-%23336791.svg?style=for-the-badge&logo=postgresql&logoColor=white"/>
+        <img src="https://img.shields.io/badge/Patroni-%23336791.svg?style=for-the-badge"/>
         <img src="https://img.shields.io/badge/etcd-%23326CE5.svg?style=for-the-badge&logo=etcd&logoColor=white"/>
       </td>
     </tr>