add library tag for better usability

since this lora is a compatible with diffusers, adding the tag enables a toggle that auto-generates an inference example with diffusers :)

README.md

@@ -7,6 +7,7 @@ tags:
 - lora
 language:
 - en
+library_name: diffusers
 ---
 # Model Card for Qwen Edit Image 2509 LoRA "This Person"