Add pipeline tag (#1)

- Add pipeline tag (881315bfd84436fd8a95305087f6e68aaf75ad94)


Co-authored-by: Niels Rogge <nielsr@users.noreply.huggingface.co>

README.md

@@ -1,3 +1,7 @@
+---
+pipeline_tag: text-to-image
+---
+
 <div align="center">
 
  **Rectified Diffusion: Straightness is Not Your Need**