Update model metadata to set pipeline tag to the new `text-ranking` (#7)

- Update model metadata to set pipeline tag to the new `text-ranking` (1853f58d1fc63f95642250e10fa2baa384e056ec)


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

README.md

@@ -16,6 +16,7 @@ language:
 - sw
 - te
 - th
+pipeline_tag: text-ranking
 ---
 
 <br><br>