Update overview.md

Author: SWHL

content/docs/overview.md

@@ -35,15 +35,14 @@ publishdate: "2023-09-08"
 ```mermaid
 flowchart LR
 
-A(YOLO) --> B(COCO)
-
-C(YOLO YMAL) --> B
+A(YOLOv5) --> B(COCO)
+C(YOLOv5 YMAL) --> B
 D(darknet) --> B
 E(labelme) --> B
 
 B --> F(labelImg)
 F --> G(PubLayNet)
-F --> J(YOLO)
+F --> J(YOLOv5)
 ```
 
 ### 安装