[fix] Fix component not found issue by changing class YOLOV5Head to class YOLOv5Head

[i-square]

Motivation

MMYOLO used YOLOv5Head instead of YOLOV5Head.

Modification

Change YOLOV5Head to YOLOv5Head.

[jason102811]

Dear i-square,
First of all, we want to express our gratitude for your significant PR in the MMDeploy . Your contribution is highly appreciated, and we are grateful for your efforts in helping improve this open-source project during your personal time. We believe that many developers will benefit from your PR.
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