update PP-HGNet_en.md

docs/en/models/PP-HGNet_en.md

@@ -12,8 +12,8 @@
     - [3.1 Installation](#3.1)
     - [3.2 Dataset](#3.2)
     - [3.3 Training](#3.3)
-      - [3.3.1 训练 ImageNet](#3.3.1)
-      - [3.3.2 基于 ImageNet 权重微调](#3.3.2)
+      - [3.3.1 Train ImageNet](#3.3.1)
+      - [3.3.2 Fine-tuning based on ImageNet weights](#3.3.2)
     - [3.4 Evaluation](#3.4)
     - [3.5 Inference](#3.5)
 - [4. Inference Deployment](#4)