Fix Latest Release button on PT README (#4572)

### What problem does this PR solve?

Latest Release button on Portugese Read me is not looking like it shuld 

### Type of change

- [X] Bug Fix (non-breaking change which fixes an issue)

README_pt_br.md

@@ -24,7 +24,7 @@
         <img src="https://img.shields.io/badge/docker_pull-ragflow:v0.15.1-brightgreen" alt="docker pull infiniflow/ragflow:v0.15.1">
     </a>
     <a href="https://github.com/infiniflow/ragflow/releases/latest">
-        <img src="https://img.shields.io/github/v/release/infiniflow/ragflow?color=blue&label=Última%20Versão" alt="Última Versão">
+        <img src="https://img.shields.io/github/v/release/infiniflow/ragflow?color=blue&label=Última%20Relese" alt="Última Versão">
     </a>
     <a href="https://github.com/infiniflow/ragflow/blob/main/LICENSE">
         <img height="21" src="https://img.shields.io/badge/License-Apache--2.0-ffffff?labelColor=d4eaf7&color=2e6cc4" alt="licença">