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` (2fb55a18c1d47cff6cd13b32219b3e764b7a31d7)


Co-authored-by: Tom Aarsen <[email protected]>

README.md

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