docs: reorganize inference acceleration sections in README

Reordered sections related to inference acceleration using CUDA and CANN to provide a clearer structure in both English and Chinese README files.

README.md

@@ -150,8 +150,9 @@ There are three different ways to experience MinerU:
 
 - [Online Demo (No Installation Required)](#online-demo)
 - [Quick CPU Demo (Windows, Linux, Mac)](#quick-cpu-demo)
-- [Linux/Windows + CUDA](#Using-GPU)
-- [Linux + CANN](#using-npu)
+- Accelerate inference by using CUDA/CANN
+  - [Linux/Windows + CUDA](#Using-GPU)
+  - [Linux + CANN](#using-npu)
 
 > [!WARNING]
 > **Pre-installation Notice—Hardware and Software Environment Support**

README_zh-CN.md

@@ -150,8 +150,9 @@ https://github.com/user-attachments/assets/4bea02c9-6d54-4cd6-97ed-dff14340982c
 
 - [在线体验(无需任何安装)](#在线体验)
 - [使用CPU快速体验（Windows，Linux，Mac）](#使用cpu快速体验)
-- [Linux/Windows + CUDA](#使用gpu)
-- [Linux + CANN](#使用NPU)
+- 使用 CUDA/CANN 加速推理 
+  - [Linux/Windows + CUDA](#使用gpu)
+  - [Linux + CANN](#使用NPU)
 
 
 > [!WARNING]