docs: fix image path in index.en.md (#17041)

* Fix image path in index.en.md

Fix image path in index.en.md

* Fix image source path in index.en.md

Updated image source path for the PaddleOCR banner.

Author: shiyuasuka

docs/index.en.md

@@ -5,18 +5,10 @@ hide:
   - toc
 ---
 
-
----
-comments: true
-hide:
-  - navigation
-  - toc
----
-
 <div align="center">
   <p>
     <a href="https://paddlepaddle.github.io/PaddleOCR/latest/index.html" target="_blank">
-      <img width="100%" src="./images/Banner.png" alt="PaddleOCR Banner"></a>
+      <img width="100%" src="././images/Banner.png" alt="PaddleOCR Banner"></a>
   </p>
 </div>