Update model metadata to set pipeline tag to the new `text-ranking` (#1)

- Update model metadata to set pipeline tag to the new `text-ranking` (776e5a6b787c54f2b7b0006e1bfb9b59e1f98e63)


Co-authored-by: Tom Aarsen <tomaarsen@users.noreply.huggingface.co>

README.md

@@ -1,3 +1,6 @@
+---
+pipeline_tag: text-ranking
+---
 Quantization made by Richard Erkhov.
 
 [Github](https://github.com/RichardErkhov)